OBJECTIVE:

An accomplished Linux systems administrator with 7 years of experience managing server infrastructure and data - center operations across multiple platforms (Redhat and CentOS Linux). Effectively plan, install, configure and optimize the Linux Systems to achieve high availability and performance. Proven ability to create and deliver solutions tied to business growth, organizational development and systems/network optimization. Skilled problem identifier and troubleshooter comfortable managing systems, projects and teams in a range of IT environments.

SUMMARY:

• Operating Systems, Software, Hardware, Networking, Infrastructure/Application, File Systems, Languages: Red Hat/ CentOS, Linux, Windows 2003, Windows 2008, Advanced Server, Windows 7/8, DHCP, DNS, TCP/IP, UDP, LDAP, VLAN, RIP, NFS, NIS, SSH, FTP, Samba, Apache, Nagios Send mail, ext3, ext4, LVM, RAID Levels 0, 1, 5, 10, NTFS, Basic Shell Scripting, Phaser Printers, HP and Dell Desktops and Servers, Cisco Switches, McAfee Found stone Vulnerability Manager, Microsoft Project, Norton Antivirus, MySQL, SQL.
• Solid 6 years of experience as a Linux System administrator/Engineer.
• Experienced for daily maintenance, configuration, architecting and managing of Linux, Red Hat and CentOS servers.
• Extensive experience of User management by setting up users and groups, network configuration, password, resolving permissions issues, user and group sudo access management.
• Excellent experience in automating installations of different flavors of Linux (RHEL5/6/7, CentOS and Ubuntu 12, 14) and VMware EXSI 5.5/6/0 using PXEboot with kickstart.
• Hands on experience in writing a bash scripts for automating tasks and for creating backups.
• Extensively worked with AWS.
• Experienced in racking, stacking of servers.
• Expertise in file systems management.
• Experienced in installing and configuring Red Hat Cluster software.
• Strong experience in Package Management using YUM and RPM.
• Solid problem solving approach in resolving daily Networking and TCP/IP, UDP ad application specific related issues.
• Excellent experience in Maintaining secure computing environments by implementing and updating IPtables rules on host firewall and SELinux modes.
• Experienced in working with SAN storage.
• Experienced in designing and Configuring NFS, NIS, LDAP, SAMBA, DNS, SNMP, DHCP services for setting up environment.
• Hands on experience in configuring and managing Apache webservers and VSFTPD servers and provide troubleshooting.
• Experienced in using Puppet for managing the infrastructure, configuration, user management, file system management, monitoring, server provisioning with manifests.
• Excellent experience in using GitHub repository.
• Proficient in regular Disk management by adding, replacing, and partitioning the existing servers according to the requirement.
• Excellent knowledge on creating and managing LVs, VGs, using LVM.
• Hands on experience in creating and cloning virtual machines using VMware Vcenter Vsphere.
• Extensively worked on upgrading the Virtual machines Vmware Confidential hosts and vcenter servers.
• Extensively utilized KVM virtualization.
• Expert level skills in setting up iLO and iDrac configuration.
• Expert in provisioning and configuration of all Linux servers.

PROFESSIONAL EXPERIENCE:

Confidential, New York, NY

Linux Systems Engineer/Administrator

Responsibilities:

• Provide object-oriented software design for one of the industry’s leading financial-management platforms.
• Modified existing software to correct errors, upgrade interfaces, and improve performance.
• Responsible for System Administration and Server builds for Linux servers.
• Stored, retrieved and manipulated data for close analysis of system capabilities.
• Build and management of of lower level environments including: cloud/Iaas software management layer, virtualization layer (VMware/ESX); virtual machines; bare metal servers; software release systems.
• Created and managed templates in VCenter.
• Installing and configuring Linux virtual machines on VMware infrastructure.
• Created shell scripts and cron jobs that monitored and reported security issues.
• Resolved security vulnerabilities by analyzing and recommending improvements in communications and network security at the component level.
• Managed, monitored and tested individual and group user access privileges and security.
• Experienced in designing cloud models for Infrastructure-as-a-Service, Platform-as-a-Service, and Software-as-a-Service.
• Strong knowledge in converting system requirements to cloud deployment strategies, feasibility and cost studies and recommend cost-effective cloud solutions .
• Experience in providing presentations to upper management on initiatives and opportunities .
• Managing Linux infrastructure involving day-to-day maintenance of servers and troubleshooting
• Plan, deploy, monitor, and maintain Amazon AWS cloud infrastructure consisting of multiple EC2 nodes and VMware VM’s as required in the environment
• Strong hands-on on AWS cloud services like EC2, S3, RDS, ELB, and EBS for installing, configuring
• Maintaining the user accounts (IAM), RDS, Route 53, VPC, RDB, Dynamo DB, SES, SQS and SNS services in AWS cloud.
• Working on providing DNS management using AWS route 53.
• Automated the cloud deployments using puppet, python and AWS Cloud formation Templates.
• Experience in DevOps automation using Ansible.
• Configured and monitored distributed and multi-platform servers using Ansible.
• Worked on Ansible playbooks to deploy new software and plugins as well as manage deployments to the productions Jenkins server.
• Performed code line GIT pushes (releases) to production and customer servers and developed and improved GIT push scripts.
• Researching and recommending innovative, and where possible, automating approaches for system administration tasks.
• RedHat Satellite Environment for Patching, Subscription management, configuration, Software management, Storage management.
• Package management using RPM and YUM.
• Bash scripting skills for creating menus, automating daily tasks, monitoring CPU usage, user management, creating backups.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents and DHCP.
• Providing troubleshoot of TCP/IP, Apache HTTP/s, SMTP and DNS.
• Raw default RHEL Image dissection to customize our build process to fit the bank needs.
• Security hardening to modifying or adding configuration files to compensate for ISVs and to prep images for our automation server build process.
• Provide unified global Service Operations through technical management of servers and services.
• Periodically perform updates across the globe to improve the reliability, performance, and security of the host infrastructure that underlies virtual machines.
• Create Host configurations and Application configurations.
• Ticket Assessment/prioritization on daily basis on RT platform and Atlassian Jiras

Confidential, New Jersey

Systems Administrator

Responsibilities:

• Engineering of systems administration-related solutions for various projects and perational needs.
• Administration of server infrastructure consisting of 1500+ servers. Both physical and virtualized servers running VMware Confidential .
• Installing new/rebuilding existing servers which support infrastructure (NIS, NFS,
• PXE boot, Kickstart File Servers, Automount, DNS, DHCP, Netbackup and Print
• Servers).
• Configuring hardware, peripherals, services, settings, directories, storage, etc. in
• Develop and maintain installation and configuration procedures.
• Installing of Confidential Hypervisor Servers, VSphere clients and Vcenter Servers.
• Creating the data stores for storing VMs and data.
• Deploying Virtual guest machines and use clones, snapshots, and templates.
• Presenting/assigning LUNS to Confidential host.
• Setting up NIS domains, which involves configuring servers and client roles, creating netgroups, maps and propagating maps to slave servers and clients via crontab jobs and manually.
• Setting up automounts for home directories in different domains, ensuring backup of all the servers and clients using VERITAS netback up software.
• User management: creating, modifying, closing and propagating maps to NIS clients.
• Solving complex application connectivity issues using tools such as tcpdump and wireshark.
• Monitoring server and network infrastructure using Nagios.
• Setting up directory shares with NFS servers, and configuring clients as NFS clients, setting up automounts for home directories in different domains.
• Creating/modifying host-based firewall rules using IPTABLES.
• Building and maintaining Domain Servers — Exchange, SMS, Active Directory, VMware, and printer servers.
• Issues related to login, performance, virus removal, adding machines to domains, granting proper permissions and applying domain group policies domain wide.
• Applying OS patches and upgrading on a regular basis.
• Configuring CPU, memory, and disk partitions as required.
• As a Linux system Administrator responsibilities included support for developers on CentOS and RedHat,installed and upgraded Operating systems, setup network printers and performing backups and restores using netbackup as needed. Duties spanned user accounts creation, modification, disk management, adding and removing packages, and patches. Performed network OS installations.
• Monitored servers using bigbrother and nagios utilities, setup NFS, NIS servers and clients.
• On Windows configured AD,DNS, and DHCP server. Solving users problems on windows was a daily routine.