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System Administrator/devops  Resume

Bethesda, MD

TECHNICAL SKILLS:

  • Strong Linux/Unix Scripting.
  • Linux
  • AWS.
  • Cloud Automation.
  • Configuration Management Tools (Chef / Puppet).
  • Puppet
  • Security
  • Bash or Shell scripting.

PROFESSIONAL EXPERIENCE:

Confidential, Bethesda, MD

System Administrator/DevOps

Responsibilities:

  • Fixed multiple redundancy issues using Redhat’s clustering technology (Pacemaker and Load Balancing)
  • Completely Automated new server deployment with Foreman and Ansible
  • Configured an automated Version control using Puppet
  • Built a fully redundant Virtual environment using Hyper - V failover and redundant Synology storage
  • Migrated all virtual machines from unpractical KVM onto Hyper-V
  • Migrated multiple physical machines onto Hyper-V
  • Implemented new Monitoring solutions (Grafana for Postgres databases; Libre NMS; PRTG )
  • Implemented Hipchat as a replacement for outdated Spark by building an On-Site Server and making it front-facing
  • Implemented Jenkins, moved a big chunk of Php scripts onto it making them visible and easy to control
  • Rebuilt current front facing DMZ making it redundant using Redhat’s pacemaker and more secure by port and firewall tuning
  • Worked with Juniper and PfSense Firewalls (Configured and tuned multiple Policy rules)
  • Started Working on the creation of an AWS failover environment for clients Web Servers.
  • Built an AWS environment consisting of 4 Availability Zones, 8 subnets (4public and 4 private, one per each client) each with an ELB in front and an Autoscaling group for 4 redundant EC2 containers running front-facing client’s Web Servers.
  • Wrote a script that triggers the AWS’s auto-scaling mechanism in case we lose 3 of our 4 on-site client’s web servers.
  • Took part in an ON-SITE Disaster Recovery creation with Automatic Failover
  • Overall datacenter maintenance (Patching, troubleshooting, replacement, built etc.)
Confidential, Columbia, MD

DevOps Engineer

Responsibilities:

  • DevOps Focus - automation, integration, orchestration via software defined environment
  • Responsible for monitoring the network, including bandwidth billing, CPU, memory, file system utilization as well as processes and making sure any custom monitoring solutions are placed in New Relic.
  • Held Access Privileges and performed hands-on maintenance of Lotame Solutions equipment at the Net Data Center IAD4 and IAD6 facilities in Ashburn VA
  • Wrote numerous bash scripts to perform various tasks (custom Nagios checks; auto scale triggers, log rotation)
  • Production experience with version control tools such as SVN and GIT and configuration management tools.
  • Helped manage internal and external DNS domains for use with clients and internal services.
  • Took part in the On-call rotation.
  • Took active part in the Rebuild process of the new Dev and QA environments.
  • Configured Nagios and wrote custom Nagios checks.
  • Production experience with Chef and Puppet automation tools for system-wide configuration and management of Linux servers.
  • Built custom Puppet modules. Wrote custom manifests
  • Worked with Hadoop including Cloudera Manager
  • Set up a backup and restore solution for Jira/Confluence
  • Worked with AWS’s EC2, RDS and Auto scale. Configured AWS environment as a way of failover for our clients servers and as a way to release the load from our physical boxes
  • Set up and configure FreeIPA server as a replacement for Windows’s Active Directory
Confidential, Reston, VA

Systems Administrator/Engineer

Responsibilities:

  • Installed, configured, hardened and troubleshoot Linux based environments (RHEL).
  • Administered and tuned application stacks (Jetty, NGINX, MySQL and Jenkins).
  • Designed and managed working AWS environments.
  • Took active part in the AWS migration.
  • Managed VMWare environments. Spinned up new VM’s, managed VMWare’s HA and
  • Monitored and tested application performance for potential bottlenecks, identified possible solutions, and worked with developers to implement bug fixes (New Relic, Atlassian JIRA and Confluence).
  • Managed system routine backups, enabling cron jobs, configuring system logging, and network logging of servers for regular maintenance.
  • Setup Virtual Linux test labs and clones for developers and engineers using VMware.
  • Worked with automation software (Puppet, Chef), including installation and configuration
  • Wrote and maintained custom automation scripts to increase system efficiency and lower the human intervention time on any tasks (Shell and Ruby).
  • Maintained all technical support department documentation, for installations, deployment, and configuration manuals.
  • Configured and performed troubleshooting for basic networking connectivity including TCP/IP, DHCP and DNS.
  • SSL configuration, hardware/software tuning, patching/upgrades.
  • Support of ECHO360’s in-house applications.
Confidential, Reston, VA

System Administrator

Responsibilities:

  • Managed vSphere ESXI clusters and virtual machines using VMware vCenter with enterprise features such as High Availability (HA), vMotion, Distributed Resource Scheduler (DRS) enabled.
  • Managed ESXI host and VMware Virtual machine upgrade as required.
  • Hands on experience in installation, configuration, supporting and managing Hadoop Clusters using Apache, Cloudera (CDH3, CDH4), Yarn distributions.
  • Maintained overall Datacenter Redundancy based on VMware cloud offering between two SSA Datacenters in Durham, NC and Woodlawn, MD.
  • Kickstarted both Virtual Server and bare-metal installation of RHEL6 and CentOS servers.
  • Configured RAID and Create LVM partitions on Dell PowerEdge 11th and 12th Generation Servers.
  • Installed Apache webservers, created v-host and sync required databases.
  • Setup Munin and Cacti server to monitor systems metrics such as uptime, services and file systems, disk usage, CPU utilization, memory stats.
  • Deployed servers using RedHat satellite profiles spacewalk, registered machines to ensure up-to-date servers.
  • Setup and configured SSH File Transfer Protocol (SFTP), VSFTP and other protocols.
  • Linux admin daily task such as user management, Cron jobs, backups, ticket resolution, troubleshooting and updating application patches.
  • Managed and configured RPM package building tools to perform custom builds and patching of applications from source code for Centos and RHEL systems.
  • Managed system routine backups, enabling cron jobs, configuring system logging, and network logging of servers for regular maintenance.
  • Follow upgrade roadmap involving installation/upgrades of server’s hard drives and memory.
  • Installed and configured intrusion detection systems such as DenyHosts for log analysis, file integrity checking, real time alerting and brute force attack prevention.
  • Troubleshoot and fixed NFS, TCP/IP and other protocols problem.
Confidential, Moldova

System Administrator

Responsibilities:

  • Installed operating systems, patches, hardware, vendor software packages, system customization and documentation of Red hat Linux, Centos and Windows 2000/ 2003 servers.
  • Diagnosed and resolved customer connectivity issues in RHEL 5 & 6 servers.
  • Configured, managed, and troubleshot the network interface.
  • Image servers and client computers to remotely manage their software after deployment on RedHat Linux 5 & 6.
  • Scheduled Cron jobs to automate regular jobs.
  • Installed hardware, software, and upgraded to ensure work is performed as per the university policy on various hardware platforms.
  • Performed user account management and administration, such as, troubleshooting user’s login and home directory related issues.
  • Built servers with jumpstart using Kickstart, CD on timely basis, according to university requirements.
  • Installed and configured Security Services like SSH, SSL, TCP Wrappers on Linux Servers.
  • Configured auto mounts/maps for the user accounts and groups.

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