SUMMARY:

• Over Seven+ years of experience in the Architecting/Development/Administration of Linux based servers in cloud and in physical environment, including Administration in Amazon Web Services (AWS) cloud environment of Red Hat Enterprise Linux, Oracle Enterprise Linux, Cent OS & AIX on various hardware platforms.
• Datacenter migration to Amazon Web Services (AWS) infrastructure and provided initial support to Applications and Database teams.
• Experience in architecting and configuring secure VPC through private and public networks in AWS.
• Configured AWS Route 53 to failover from AWS cloud to physical datacenter and vice - versa.
• Store, Manage & Monitor applications on S3 storage, including accessibility, Cross Region Replication and create and monitor Events, using Cloudberry Explored and s3cmd CLI.
• Define standards for configuring and using AWS services in a secure and scalable manner.
• Designed, configured and deployed Amazon Web Services (AWS) for a multitude of applications utilizing the AWS stack (Including EC2, Route53, S3, RDS, Cloud Formation, Cloud Watch, SQS, IAM), focusing on high-availability, fault tolerance, and auto-scaling.
• Designed, configured and managed public/private cloud infrastructures utilizing Amazon Web Services (AWS), including EC2, S3, Cloud Front, Elastic Filesystem, RDS, VPC, Direct Connect, Route53, Cloud Watch, Cloud Trail, Cloud Formation, IAM which allowed automated operations.
• Configured AWS cloud watch to monitor AWS resources and application, including creating AWS customized Scripts to monitor various application and system & Instance metrics.
• Troubleshoot AWS EC2 Status check including System Status checks and Instance Status check alerts.
• Good understanding of AWS Elastic Block Storage (EBS), various volume types and utilization of different types of EBS volumes based on requirement.
• Monitor various AWS resources such as AWS EBS, RDS, ELB, EC2 etc. using AWS Cloud Watch by using available metric and also develop customized metrics in Perl.
• Provided high available AWS Infrastructure by using Scalability and Elasticity options based on requirement.
• Worked with DB teams to deploy RDS in Multiple Availability zones and configure & tested DB Failover scenarios by creating read replicas of primary DB, including testing of Read replicas to promote to Primary DB and configured backups of DB.
• Configured health checks for AWS Elastic Load Balancer and used sticky sessions to divert users, also based on traffic spikes, pre-warm ELB to avoid ELB down time.
• Configured logs storage to AWS S3 on daily basis and archive off to AWS Glacier based on retention policy of applications and databases.
• Configure AWS Multi Factor Authentication to enable 2 step authentication of user’s access using Google Authenticator and AWS Virtual MFA apps.
• Create Health Checks on Elastic Load balancer to configure failover policies using various R53 routing policies such as Failover/Weighted/Latency/Geolocation.
• Created Public/Private Instances on VPC to provide tiered security for DB servers, by setting up route on private subnets to route through NAT instance.
• Experience with creation of rules for ACL to limit access to servers and inbound and outbound traffic to servers.
• Configured S3 lifecycle of Applications & Databases logs, including deleting old logs, archiving logs based on retention policy of Apps and Databases.
• Build Customized Amazon Machine Images (AMIs) & deployed these customized images based on requirements.
• Provided security and managed user access and quota using AWS Identity and Access Management (IAM), including creating new Policies for user management in JSON.
• Configured and Managed Elastic Load Balancing(ELB) to avoid fault tolerance and avoid single point of failure of applications, hence provide high availability and network load balancing.
• Monitor Resources and Applications using AWS Cloud Watch, including creating alarms to monitor metrics such as EBS, EC2, ELB, RDS, S3, SNS and configured notifications for the alarms generated based on events defined.
• Worked with networking teams in configuring AWS Direct Connect to establish dedicated connection to datacenters and AWS Cloud.
• Provided application security in AWS environment using AWS WAF service, including creating custom rules to allow, block, count requests from IP or strings that appear in request, configured AWS WAF to recognize and block web applications security risks such as SQL Injection attacks and Cross Site Scripting (XSS) and monitor these rules and traffic.
• Expert in following all the Enterprise Process and Procedures during Change Management, Maintenance windows, migrations and upgrades.
• Involved in migration and consolidation of Unix Servers in Development, Staging and Production Environments.
• Performed NIM installation and Kick Start over network and created, maintained installation server, boot server and profile server.
• Good knowledge of third party services to be used with AWS infrastructure such as Cloudberry for S3 management, Logic Monitor, Splunk, Cloud Threat, Trend Macro, etc. to help provide security, reasonable pricing for various resources, relatability, scalable and monitored infrastructure.
• Security Configuration, Network, System Monitoring on UNIX based Servers - Basic hardening of the system and network security, attaining the goal of allowing only the valid users/ports into the system.
• Develop tools to automate the deployment, administration, and monitoring of a large-scale Linux environment using Puppet.
• Expertise in using various Puppet features including Resource management (Package, Service, File), User Management, Modules, Class, Definition, Templates, Factor and external commands.
• Experience in puppet server client installation, configuration and troubleshooting.
• Automate configuration management using Puppet, including setting up puppet master and agents, defining and configuring nodes etc.
• Experience in customization of modules from puppet forge for environment needs.
• Developed automation framework for Application Deployments to the AWS cloud environments.

TECHNICAL SKILLS:

Operating Systems: RHEL 4.0/5.0/6.0, OEL 5.X/6.x, Amazon Linux, Ubuntu, AIXVirtualization: VMware ESX4 server, VMware Workstation, VirtualBox, AWS EC2

Storage: AWS Elastic Block Storage(EBS), AWS S3, AWS Glacier, VERITAS Volume manager 3.5 and 4.x, Logical Volume Manager, Tivoli (TSM)

Web Servers: Apache1.3.x, 1.2, 2.x, Web Logic, Web Sphere, ATG, Java Web Server, Vertual Hosting, Splunk 5.0s, LAMP stack, Tomcat, IIS 5.0/ 4.0, SAMBA v3.0,, Send mail.

Database Servers: Oracle8i/9i, 10g, 11g, MS SQL, MySQL 5.1/5.5/6

Network Services: AWS VPC, AWS Direct Connect, AWS Route 53, SMTP, SNMP, SSL,DHCP, POP, HTTP, SMB, NIS, NIS+, NFS, SFTP, DNS, FTP/TFTP, LDAP, JDBC, ARP/RARP, SSH, TCP/IP, WEBSM, NAT, NTP, TELNET.

Scripting: KSH, Bash, Korn, Perl Scripting, Python, Ruby, PHP, Shell Scripting

PROFESSIONAL EXPERIENCE

Confidential, Chicago, IL

AWS Cloud Infrastructure Engg

Responsibilities:

• Provided 24 x7 on-call supports in debugging and fixing issues related to Linux in Cloud Environment using Amazon Web Services (AWS).
• Build customized AWS Infrastructure for various applications from scratch (EC2, RDS, Security Groups, VPCs, public/private subnets, ELB, Auto scaling, roles, policies etc.) and establish connectivity between various AWS resources.
• Build customized infrastructure for various environments such as Development, QA, UAT & Production and provision various AWS resources based on type of environment and provided support, including on call support.
• Build, customize and configure OPENVPN to allow connectivity to private AWS resources through OPENVPN, help end users to troubleshoot establishing connectivity to private AWS resources and configure AD server to authenticate users via radius authentication, once reached a level of stability, scripted entire OPENVPN infrastructure to launch similar environments.
• PRTG to monitor various AWS resources, including alerts for prod, uat environments for connectivity, ping test, tunnel status etc.
• Configured web application Instance (Tomcat, Apache) to connect to resources in another AWS VPC & determine latest version to be used based on compatibility of host and configure new upgraded app server to work for specific application.
• Configure High availability of AWS Infrastructure and tested this in QA environment and upon signoff from QA team implemented in higher environments.
• User management including IAM level (AWS Console level)- by creating roles to allow user to switch roles and editing trust relationship to allow switch from main account to other account and at AWS Instance level as well.
• Established connectivity to AWS resources in another VPC in another region using AWS VPC peering and strong swan/IPSEC tunnel.
• Provided support to Application and database team, troubleshoot issues encountered while providing support, contact AWS Support whenever necessary.
• Troubleshoot application and database issues, document root cause and help other teams to understand root cause and solutions for the problems.
• Provided alternative and cost effective strategies using various AWS features for already existing and new strategies.
• Architected & Implemented security to meet PCI requirements, using VPC Public/Private subnets, Security Groups, NACLs, IAM roles, policies, VPN, WAF, Trust Advisor, Cloud Trail etc. to pass penetration testing against infrastructure.
• Introduce new features of AWS (such as EFS, CF etc.) to replace already existing 3rd party resources and to have better and cost effective strategies.
• Build Customized AWS IAM policies to restrict access to various AWS resources based on user requirements (developers, BI teams, DB teams, Redshift teams etc.)
• Pre warm new AWS accounts for application deployments.
• Develop AWS CloudFromation templates (in JSON) to automate infrastructure deployments on the go.
• Manage Application logs to provide better accessibility to different teams.
• Implemented Continuous Integration and Delivery (CICD) using Jenkins plugin to automatically deploy builds with AWS Code Deploy including creating an AWS Code Commit repository, installing Jenkins and the Jenkins plugin, adding files to the Code Commit repository and configuring the plugin to create a deployment when changes are committed to an AWS Code Commit repository.
• Provided support to DB team, in managing backups, restoring from snapshots, establishing connectivity between application and DB, help in migrating DB from ec2 to RDS using DMS, configuring application to listen to DB etc.

Environment: Linux (RHEL 6.x/7.x), Amazon Linux, Ubuntu, Oracle SE, PostgreSQL, Amazon Web Sevices (AWS), Crontab, Perl, ksh, Shell Scripting, Bash, JSON, AWS EC2, AWS S3, Glacier, EBS, EFS, CloudFront, AWS IAM, AWS VPC, AWS Route 53, AWS Cloud Watch, AWS Ops Works, AWS IAM, AWS WAF, AWS SNS, AWS Elastic Load Balancing(ELB), AWS Cloud Front, AWS AMIs, PRTG, OPENVPN, TrendMicro Deep Security, Jenkins, Code Deploy, GIT, AWS CloudFormation, CloudTrail, AWS Certificate Manger, Thawte SSL, IPSEC/Strongswan Tunnel, JIRA, Confluence, Hipcaht, Stash etc.

AWS Architect/SysOps Engg

Responsibilities:

• Experience in architecting and configuring secure VPC through private and public networks in AWS.
• Configured applications in virtual private cloud (VPC) and hardened it from malicious attacks using 2-layer protection from security groups (at instance level) and network access control lists (NACL, at subnet level) and using network access translator (NAT) instance.
• Deployed LAMP based applications in AWS environment, including provisioning MYSQL-RDS and establish connectivity between EC2 instance and MySQL-RDS via security groups.
• Configured Elastic Load balancer(ELB) including high availability of ELB using various subnets in various availability zones, configured security settings and health check for application.
• Provisioned AWS S3 buckets for backup of the application and sync this contents with remaining s3 backups, by creating entry for AWS S3 SYNC in crontab.
• Wrote script to monitor crontab error messages and publish this to AWS CloudWatch using PERL.
• Configured Apache on EC2 instances to make sure application that was created is up and running, troubleshoot issues to meet the desired application state.
• Established connectivity between application and MySQL Db and tested this connectivity (by RDS-endpoints)
• Created customized AMIs based on already existing AWS EC2 instances by using create image functionality, hence using this snapshot for disaster recovery.
• Created AWS Launch configurations based on customized AMI and use this launch configuration to configure auto scaling groups.
• Configured auto scaling in customized VPC, based on elastic load balancer (ELB) traffic and using ELB health check in order to trigger auto scaling actions.
• Configured auto scaling policies to scale up/down EC2 instances based on ELB health checks and created alarms to be used in auto scaling decision making policies.
• Simulated failover by randomly deleting instances to test auto scaling is working and eventually configuring chaos monkey to do the same.
• Automate configuration management using Puppet, including setting up puppet master and agents, defining and configuring nodes etc.
• Experience in customization of modules from puppet forge for environment needs.
• Developed automation framework for Application Deployments to the AWS cloud environments.
• Worked on Managing the Private Cloud Environment using Puppet.
• Developed Perl and shell scripts for automation of the build and release process, developed Custom Scripts to monitor repositories, Server storage.
• Automated the cloud deployments using puppet and AWS Cloud Formation Templates.
• Created read replicas of AWS-RDS-MySQL Db in various regions and AZs using backups and snapshots and scale out AWS-RDS-MySQL instance to additional AZs and regions based on requirements using DB snapshots.
• Tested high availability of AWS-RDS-MySQL database by simulating failover from primary database to read replicas and hence promoting read replica to primary.
• Monitor sync or lag between primary and read replicas of AWS-RDS-MySQL, using AWS cloud watch metrics such as replica lag and created alarms when these events are triggered and send notification using AWS SNS.
• Expertise in AWS Identity and Access Management (IAM) components, including user, groups, roles, policies and password policies and provide the same to end user.
• Created customized AWS Identity and Access Management(IAM) polices for various AWS resources to have required accessibility to required resources.
• Performed configuration, deployment and support of cloud services including Amazon Web Services (AWS).
• Designed, configured and deployed Amazon Web Services (AWS) for a multitude of applications utilizing the AWS stack (Including EC2, VPC, Glacier, Route53, S3, RDS, Cloud Watch, Cloud Trial, WAF, SNS and IAM), focusing on high-availability, fault tolerance, and auto-scaling.
• Configured an AWS Virtual Private Cloud (VPC) and Database Subnet Group for isolation of resources within the Amazon RDS MySql DB cluster.
• Implemented AWS High-Availability using AWS Elastic Load Balancing (ELB), which performed a balance across instances in multiple Availability Zones.
• Assigned AWS Elastic IP Addresses used to work around host or availability zone failures by quickly remapping the address to another running instance or a replacement instance that was just started.
• Store, Manage & Monitor applications on S3 storage, including accessibility, Cross Region Replication and create and monitor Events, using Cloudberry Explored and s3cmd CLI.
• Configured and managed AWS Glacier, to move old data to archives based on retention policy of databases/ applications (AWS Glacier Vaults).
• Provided security and managed user access and quota using AWS Identity and Access Management (IAM), including creating new Policies for user management in JSON
• Defined AWS Security Groups which acted as virtual firewalls that controlled the traffic allowed to reach one or more AWS EC2 instances
• Experience working on Multiple AWS instances, set the security groups, Elastic Load Balancer and AMIs, Auto scaling to design cost effective, fault tolerant and highly available systems.
• Utilizing Cloud Watch and Logic Monitor to monitor resources such as EC2, EBS, ELB, RDS, S3 etc.
• Configured Jenkins for continuous Integration with Stash using GIT repository and AWS Code Deploy as Continuous Deployment.

Environment: Linux (RHEL 4.x,5.x and 6.1/6.6), Amazon Linux, Oracle 11/10g, Amazon Web Sevices (AWS), Crontab, Perl, ksh, Shell Scripting, Bash, JSON, AWS EC2, AWS S3, Glacier, AWS Imp/Export Snowball, AWS RDS, AWS VPC, AWS Direct Connect, AWS Route 53, AWS Cloud Watch, AWS Ops Works, AWS IAM, AWS WAF, AWS SNS, AWS Elastic Load Balancing(ELB), AWS Cloud Front, AWS AMIs, Jenkins, Stash

AWS DevOps/SysOps Administrator

Responsibilities:

• Datacenter migration to Amazon Web Services (AWS) infrastructure and provided initial support to Applications and Database teams.
• Build sample applications on AWS which demonstrate architectural features.
• Define standards for configuring and using AWS services in a secure and scalable manner.
• Designed, configured, Troubleshoot and deployed Amazon Web Services (AWS) for a multitude of applications utilizing the AWS stack (Including EC2, Route53, S3, RDS, Cloud Formation, Cloud Watch, SQS, IAM etc.), focusing on high-availability, fault tolerance, and auto-scaling.
• Expertise in AWS environment including AWS Storage and content Delivery, Databases, Networking, Management Tools, Security & Identity etc.
• Develop tools to automate the deployment, administration, and monitoring of a large-scale AWS Linux environment.
• Deployed and Configured various storage services such as S3, Cloud Front, Glacier, Import / Export Snowball etc.
• Configured and migrate Applications to AWS Route 53 and hence providing traffic management, application availability and high availability.
• Created and tested applications in Isolated cloud resources using Virtual Private Cloud (AWS VPC).
• Data management in AWS cloud including disaster recovery, Backups, automated backups, storing log files etc.
• Provided security and managed user access and quota using AWS Identity and Access Management (AWS IAM), including building IAM Policies in JSON.
• Configured AWS S3 lifecycle of Applications & Databases logs, including deleting old logs, archiving logs based on retention policy of Apps and Databases.
• Created and tested alarms to monitor overall health of the servers and applications using AWS Cloud Front
• Monitor Resources and Applications using AWS Cloud Watch, including creating alarms to monitor metrics such as EBS, EC2, ELB, RDS, S3, SNS and configured notifications for the alarms generated based on events defined.
• Provided application security in AWS environment using AWS WAF service, including creating custom rules to allow, block, count requests from IP or strings that appear in request, configured AWS WAF to recognize and block web applications security risks such as SQL Injection attacks and Cross Site Scripting (XSS) and monitor these rules and traffic.’’
• Store, Manage & Monitor applications on AWS S3 storage, including accessibility, Cross Region Replication and create and monitor Events, using Cloudberry Explored and AWS s3cmd CLI.
• Provide 24*7 Application availability using Auto Scaling Services, including configuration, define and testing auto scaling policies and created alarms to call scale up/down policy.
• Configured AWS cloud watch to monitor AWS resources and application, includes creating AWS Customized Scripts to monitor various application and system & Instance metrics.
• Troubleshoot AWS EC2 Status check including System Status checks and Instance Status check alerts.
• Good understanding of AWS Elastic Block Storage (EBS), various volume types and utilization of different types of EBS volumes based on requirement.
• Configured cloud Watch to monitor EBS volumes including monitoring VolumeQueueLength to monitor applications/databases performance.
• Monitor RDS by events/Metrics, such as Database Connections, Disk QueueDepth, Free Storage Space, ReplicaLag, Read/Write IOPs, Read/Write Latency.
• Monitor various AWS resources such as AWS EBS, RDS, ELB, Elastic Cache using AWS Cloud Watch by using available metric and also develop customized metrics.
• Monitor various AWS resources such as AWS EBS, RDS, ELB, Elastic Cache using AWS Cloud Watch by using available metric and also develop customized metrics.
• Provided high available AWS Infrastructure by using Scalability and Elasticity options based on requirement.
• Worked with DB teams to deploy RDS in Multiple Availability zones and configure & tested DB Failover scenarios by creating read replicas of primary DB, including testing of Read replicas to promote to Primary DB and configured backups of DB.
• Tested Disaster Recovery scenarios in cloud using AWS including Backup & restore, pilot light and warm standby scenarios.
• Configured health checks for AWS Elastic Load Balancer and used sticky sessions to divert users, also based on traffic spikes, pre-warm ELB to avoid ELB down time.

Environment: Linux (RHEL 4.x,5.x and 6.1/6.6), Amazon Linux, Oracle 11/10g, Amazon Web Sevices (AWS), Auto sys 4.5, Perl, ksh, Shell Scripting, Bash, JSON, AWS EC2, AWS Elastic Beanstalk(EBS), AWS Lambda, AWS S3, Glacier, AWS Imp/Export Snowball, AWS RDS, AWS VPC, AWS Direct Connect, AWS Route 53, AWS Cloud Watch, AWS Ops Works, AWS IAM, AWS WAF, AWS SNS, AWS Elastic Load Balancing(ELB), AWS Cloud Front, AWS AMIs.

System Administrator

Responsibilities:

• Provided troubleshooting support for development, test, and production environments for UNIX and Linux servers.
• Performed installation, configuration, and upgrades primarily on AIX 4.x/ 5.1/5.2/5.3/6 L and Redhat Linux AS 4.0/5.X/6. X.
• RedHat Enterprise Linux Operating System Installation, Building Servers and administration of RHEL 4.x/5.x/6.x & SUSE 10.x. which includes testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Configured kickstart server and updating/applying patches to the servers using Redhat Satellite server.
• Involved in Adding new disks, formatting, partitioning, disk space allocation, monitoring system performance, system tuning, server hardening and crash recovery issues.
• Provide support to Account Managers, UNIX and Windows technicians, and other department s
• Monitored the performance of the system using ps, prstat, vmstat, mpstat, perfmeter and iostat to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic
• Supporting servers with Oracle 10g and MySQL Databases, co-coordinating with DBA’s for Kernel Tuning and performance monitoring.
• Build Yum and RPM repository Server for Development team to upload packages, Written UNIX Shell scripts for monitoring & clean up old files.
• Installing and configuring Apache and supporting them on Linux production servers.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Experience in Developing KORN, BASH, PERL, Python shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, WebSphere and WebLogic application server.
• Assisted in configuring the application servers with other components such as database, web servers, LDAP directory, Active Directory, BEA Web logic etc.
• Applied appropriate support packages/patches to maintain system integrity and provide security.
• Performed capacity analysis, monitored and controlled disk space usage on systems.
• Monitored system activities and fine-tuned system parameters and configurations to optimize performance and ensure security of systems.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Implementation of VMware Infrastructure for Windows, SLES 11 & Linux RedHat 5.0 with VMware ESX 3.5, Virtual Center 2.5 and administered the VMs with VI client.
• Monitored the performance of the system using ps, prstat, vmstat, mpstat, perfmeter and iostat to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic
• Install Software, troubleshoot, diagnose, and resolve hardware and software and connectivity problems in accordance with Service levels.
• Installation of Oracle patches and troubleshooting, creating and modifying application related objects, creating profiles, users, roles and maintaining system security.
• Troubleshoot hardware, software and operating system related errors on Linux and UNIX.
• Created users, manage user permissions, maintain User & File system quota on AIX and Linux servers.
• Monitored servers, switches, ports etc with Nagios monitoring tool.
• Define/setup network protocols, Network File Services (NFS) and Network Information Services (NIS) on Linux and AIX servers.
• Performed security, users, group’s administration and daily backup and restore operations, networking service, performance, and resource monitoring.
• Documented and maintained the inventory using asset management techniques.

Environment: SLES 9, 10, Redhat 3.x, 4.x, 5.x, Windows Server 2000/2003/2008, Tivoli Storage Manager, Single Sign On, JBOSS, LDAP, DNS, VIO, NIM, NFS, TCP/IP, SAN, NAS, Nagios 2.x, WebLogic 8.1, Oracle 9i/10g/11g, Tivoli Storage Manager 5.x, VMware 2.x, Shell Scripting, F5 Load balancer, YUM, RPM, Splunk, Apache, Firewalls, LVM, LDAP, Kickstart, Puppet

Linux Administrator

Responsibilities:

• Install, Configure, and distribute newly acquired equipment.
• RedHat Enterprise Linux Operating System Installation, Building Servers and administration of RHEL 4.x/5.x/6.x & SUSE 10.x. which includes testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Involved in Adding new disks, formatting, partitioning, disk space allocation, monitoring system performance, system tuning, server hardening and crash recovery issues.
• Provide support to Account Managers, UNIX and Windows technicians, and other departments
• Monitored the performance of the system using ps, prstat, vmstat, mpstat, perfmeter and iostat to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.
• Support for Linux operating systems and do install at clients place as they are resellers of computers
• Install Software, troubleshoot, diagnose, and resolve hardware and software and connectivity problems in accordance with Service levels.
• Account management using Active Directory such as resetting password, unlocking accounts, creating new accounts, adding users to GP, setting up email accounts on exchange server and distribution lists etc.
• Remote installation, configuration and troubleshooting of printers, software and business applications.
• Determining and resolving networking issues such as loss of network connectivity and missing network drives.
• Automated Windows XP SP2 Deployment to client desktops using SMS 2003.
• Lodging service requests with vendors like HP, Compaq, and Toshiba, Dell etc.
• Resolving email problems in MS Outlook.
• Ensure Inventory and configuration records are kept up-to-date.

Environment: Oracle Enterprise Linux OEL 5.X/6.X, Redhat 3.x, 4.x, 5.x, Windows Server 2000/2003/2008, Tivoli Storage Manager, Single Sign On, JBOSS, LDAP, DNS, VIO, NIM, NFS, TCP/IP, SAN, NAS, Nagios 2.x, WebLogic 8.1, Oracle 9i/10g/11g, Tivoli Storage Manager 5.x, VMware 2.x, Shell Scripting, F5 Load balancer, YUM, RPM, Splunk, Apache, Firewalls, LVM, LDAP, Kickstart, Puppet.