Objective

• To obtain employment as a Linux Systems Administrator/Engineer

SUMMARY

• 9+ years of experience as a system administrator in large network environments
• Strong administration and troubleshooting skills on windows and various Linux distributions
• Confident with Apache, NFS, NTP, Samba, Firewalls and SELinux
• Strong Kubernetes administration experience
• Ansible builds and deployments
• Well - versed with MariaDB, Mysql, Amazon DynamoDB and Redshift
• Good understanding of Windows Active Directory and related services
• Skilled with DNS, Amazon Route53, CloudFront, Elasticache
• Confident with Storage services such as ISCSI, Amazon S3, S3-IA, RRS and Glacier
• Solid understanding of TCP/IP and networking concepts
• Confident using configuration management tools and bash scripts to automate tasks
• Confident with Virtualization platforms such as AWS, VMWare, Hyper-V and VirtualBox
• Well organized with strong problem-solving skills, good communication and an ability to work on team or independently

TECHNICAL SKILLS

• Ansible
• Jenkins
• Jira
• Bitbucket
• GitLab
• GitHub
• Bash Script
• Python
• Nagios
• Splunk
• F5 Load Balance
• Kibana
• Elasticsearch
• Logstash
• Docker
• Confluence
• Bamboo
• Hyper-V
• EMC Networker
• Apache
• MariaDB
• Oracle SQL
• SSL
• DNS
• Route53
• NFS
• NTP
• EC2
• VPC
• S3
• TCP/IP
• Samba
• ISCSI
• SMTP
• VMWare
• KVM
• Firewalls
• IPS
• IDS
• Forensic tool kit (FTK) kali
• Wireshark
• Nmap
• Linux Distributions (Red hat 6/7, CentOS 6/7)
• Network Routing and Switching

PROFESSIONAL EXPERIENCE

Confidential, Reston VA

Linux Engineer

Responsibilities:

• Daily Administration and Management of Multiple Red Hat Enterprise Linux servers
• Upgrade Security Centers and Scanners to the latest DISA-approved version and deploy the latest ACAS Feeds and Plugins
• Installed and configured IMAP/POP email servers
• Installed and configuring mail transport agents like Postfix and Sendmail
• Ensure all ACAS scanners and Security Center are operational and reporting properly
• Deploy and manage ACAS scan configurations
• Investigate false positives or any invalid scan results
• Conduct scans and provide detailed reporting to customer
• Performed package management for system upgrades and updates using yum and rpm
• Perform in the field systems updates
• Build and manage Kubernetes cluster
• Build local yum repository for internal network use
• Troubleshoot network connectivity, hardware, CPU, memory, I/O, boot, DNS and other application issues
• Provided system support to local and remote users
• Administered, troubleshot, and monitored Linux systems.
• Configure NFS servers for file sharing across the network
• Automate Linux patching with ansible playbooks and add-hoc commands
• Automated some basic tasks using shell scripting.
• Creating, managing and troubleshooting user/group accounts via Microsoft Active Directory (AD)
• Monitor and promptly respond to trouble tickets that may involve all tiers of system support (hardware, software, accounts, peripherals, etc.)
• Configured DNS servers for local name resolution in test environment
• Designed and implemented AWS Cloud migration of on-premise Linux based IT infrastructure
• Configure directories to enable group collaboration and private/public sharing
• Perform daily system and security monitoring to identify any possible intrusions
• Participate in on-call rotation to oversee upgrades and ensure uptime of all services
• Develop and maintain installation and configuration procedures
• Write AWS CloudFormation Templates and deployed stacks of AWS resources on AWS
• Performed Kubernetes System Administration in a DevOps CI/CD
• Create Ansible playbooks for various configurations management tasks
• Design from scratch, the architecture for an enterprise Kubernetes infrastructure to support a CI/CD pipeline for GitLab CI/CD and Jenkins CI/CD
• Performed End-to-end Implementation of the Kubernetes architecture
• Implemented multiple Kubernetes masters for high availability
• Configured persistent storage for Kubernetes clusters/pods, utilizing best practices, configuring NFS and persistent volumes
• Configured Kubernetes auto provisioning, and auto scaling of CI/CD job/build agents/runners/nodes
• Designed and implemented clusters,cluster segmentation, internal/external networking for 4+ CI/CD deployment environments; dev, test, staging, production
• Configured CI/CD deployments with ConfigMaps, Secrets and SecurityContexts
• Implemented Kubernetes services and Network Policies
• Performed Network Encryption between Kubernetes clients such as Kubernetes control plane and nodes
• Installed, configured Ingress Controllers for Nginx or others
• Performed Ingress TLS Termination
• Performed back up of etcd store and restore the etcd from cluster failure
• Used Rolling Updates to gradually replace old pods with new pods wihtout incurring downtime

Confidential, Washington, DC

Responsibilities:

• Systems monitoring and incident response
• Defined SLOs for application services or transactions and identified SLIs for SLOs
• Engaged in meeting with Product Owners or Application Owner to agree on SLOs
• Configured dashboards for defined SLOs in Splunk and Dynatrace
• Come up with recommended list of standard metrics, thresholds and severities for alerts and provide guidelines for setting them up.
• Set up monitoring for Latency, Traffic, Errors and Saturation.
• Performed performance tests for all critical components
• Performed capacity validation for services and infrastructure
• Create disaster recovery strategy and plans
• Participate in Executions of Disaster recovery scenarios for regional failover / failback
• Documents steps for handling incident resolution and communication
• Create Runbooks based of SRE defined standards
• Utilize functional automation developed by Automation team to setup production

Confidential - Mclean, VA

Sr. Linux Engineer

Responsibilities:

• Design and implement Linux based IT infrastructure, in the cloud and on premises to help launch and operate the OneWeb world’s largest Satellites constellation.
• Write AWS CloudFormation Templates and deployed stacks of AWS resources on AWS
• Write ansible playbooks to perform software installation, post system build configuration, new release deployments, system monitoring and system provisioning
• Support OneWeb production systems with fail-over, load-balancing, backup, security, log management and monitoring services.
• Maintain 99.99% system SLA. Perform final escalation points for production infrastructure issues or outages.
• Automate the deployment of a complex system consisting of physical, virtual machines and containers.
• Monitor security and operation alerts, take preventative or corrective actions to resolve issues.
• Ensure effective performance and 24x7 availability of the production IT systems

Confidential - Bethesda, MD

Sr. Linux/DevOps Administrator

Responsibilities:

• Responsible for monitoring dev, QA and Prod applications, middleware, and infrastructure, and to collaborate with team members to develop automation strategies and deployment processes.
• Work with software application developers to architect, configure, and troubleshoot application servers and the software running on them.
• Implement custom installations, changes, upgrades, patches for Dev, QA and production
• Install and configure systems, custom and third-party software packages
• Translate development team requirements into Application/System configuration
• Coordinate tasks between Development teams and Systems team
• Constantly evaluate and improve current processes or design and implement new processes to meet business needs
• Deploy approved release packages and break-fix solutions in accordance with all enterprise architecture and configuration, change, and release management policies and procedures.
• Provide systems engineering and architecture support to ongoing infrastructure operations and projects to maintain highly efficient networks of shared computing resources and data.
• Experience evaluating, designing and implementing server build processes to meet business needs
• Use Systems Tools and Networking knowledge to isolate and fix application problems
• Manage the deployment, maintenance, and upgrade process of Applications developed by different development groups and teams.
• Experience installing, configuring and supporting Java based Application Web Servers (Tomcat)
• Experience with cloud technologies such as Amazon Web Services (AWS)
• Ability to install, maintain and support MySQL, Maria dB and Oracle databases
• Install configure and support LAMP servers
• Experience supporting F5 LTM BigIP
• Write and modify standard puppet manifest scripts
• 24/7 remote web and application support.

Confidential - Silver Spring MD

Linux Systems Administrator

Responsibilities:

• Served as a subject matter expert in Linux System Administration, performed OS installs and software installations and upgrades within VMWare ESXi or AWS environments
• Maintained current server infrastructure, provided recommendations and fixed technical problems in a cost-effective manner
• Used a cluster of datastore storage to create and attach ISCSI storage blocks to several Linux systems
• Developed automated scripts to audit user and system accounts for log activities and disk usage
• Used VI/VIM text editor to modify configuration file, create cron jobs and scripts
• Create and managed Linux instances on AWS
• Configuration and administration of Web (Apache) and FTP Servers in Linux servers
• Installed, monitored and supported Web and Application Servers on Linux environments.
• Configured, deploy, and hosted Apache web server in a production environment.
• Created and maintained user profiles, security access rights, disk space and process monitoring.
• Installed and Managed ansible infrastructure
• Managed Windows Active Directory Environment for account creation, GPO, Permissions, DNS, DHCP
• Demonstrated expertise in configuring, managing and troubleshooting variations of DNS, DHCP, TCP/IP and other Networking issues
• Implemented file level security controls Application from unauthorized read/write/execute operations and disabled unnecessary services
• Created and implemented storage life cycle policies to meet organization compliances
• Monitored and Optimized Server and Network performance
• Provisioned, query, delete, Backed up and Restored MySQL/MariaDB databases
• Used EMC Networker for Backup and Recovery in VSphere Web Client
• Configured Firewall Access Control List to prevent Unauthorized access to systems and resources
• Configured the SIEM solution to collect system logs from windows and Linux systems

Confidential, Frederick, MD

Linux Administrator

Responsibilities:

• Experienced in System Administration, Installation, Upgrading, Patches, Migration, Configuration, Troubleshooting.
• Maintaining file systems and enforcing SeLinux and Kerberos authentication on NFS shares
• Implemented SElinux and SSL/TLS certificates on apache web servers.
• Created and maintain SSH key pair for remote connections
• Conduct security Control Assessment on General Support Systems (GSS)
• Major Applications and systems to ensure that such information system are operating within strong security posture
• Configured client networks to integrate Windows systems with Linux systems including
• SAMBA sharing, Print servers, and Router configurations.
• Experienced in System Administration, Installation, Upgrading, Patches, MigrationConfiguration, Troubleshooting.
• Experience working in a vCloud environment and with Redhat clusters.
• Vast knowledge on VMware, Vmotion and Vrealize
• Experience with SIEM and Intrusion detection systems Configured Host based Intrusion detection system
• Configure Storage, Disk Management, Logical Volume Management (LVM) and logical partitioning.
• Configured the Kernel parameters and updated the Kernel for MySQL Database
• Troubleshoot connectivity to Servers and Network systems
• Wrote and executed Korn shell scripts to automate cron jobs and system maintenance.
• Monitor system backups and restore files as needed
• Perform fault isolation for all Linux systems to prevent re - occurrences of problematic processes.
• Perform maintenance of file systems, create cron jobs for periodic processes Experienced using Red Hat Satellite server to deploy, monitor, update, and manage systems.
• Worked closely with the Development and Business teams to gain understanding on system requirements and ensuring that security concerns are implemented in builds
• Executed Security Control Assessment and continuous Monitoring activities on builds
• Created Manual test cases based on the test plan and the requirements documents
• Executed Manual test cases and analyze results
• Managed, tracked, and documented defects in the build using Mercury Quality Center