Mark Tabish

Lead Cloud Engineer at Northwood Global Solutions, LLC
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Location
Sterling, Virginia, United States, US

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Scott D.

I had the pleasure of working with Mark Tabish for three years at ASM Research. During his time at the company he displayed and extraordinary work ethic and was always a team player. Mark was always willing to help out his co-workers, even if the issue didn't fall under his requirements. Mark Tabish is the perfect example of what a Systems Administrator should be.

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Experience

    • United States
    • Information Technology & Services
    • 1 - 100 Employee
    • Lead Cloud Engineer
      • Dec 2016 - Present

      Application Team » Lead a team of system engineers that supported 3 application teams » Trained junior engineers to be able to handle issues on their own » Worked to migrate flag ship app from on prem to the cloud. Major tasks: › Created Infrastructure as Code (IaC) using Ansible, CloudFormation, Python, and Bash › Created ansible automation to do one button deployments using Enterprise Jenkins of each component of the application › Servers I deployed included three different Java web apps, COTS product, MarkLogic Database, DynamoDB, Oracle Database, custom ETL servers, Jenkins Build servers, Grafana and Prometheus for monitoring, Locus for load testing, and Nexus for artifact versioning › Created automation for automatic backup and restoration › Architect the environment to be Highly Available by using AutoScale and ELBs › Put the system through the full Assessment & Authorization (A&A) from start to finish › Scanned the system with Nessus › Mitigated POAMs findings DevOps Tool Building Team » Deployed a Highly Available Nexus in AWS using Ansible » Worked to ensure migration off of legacy Atlassian to Enterprise Atlassian and decommission legacy Atlassian. » Fully Automated HA Proxy using Ansible » Optimized HA Proxy for AWS to load balance for applications. » Enabled HA Proxy to pass on client PKI certificates to webservers Infrastructure Team » Migrated applications from on premise to AWS Cloud » Set up Splunk » Analyzed past EC2 usage and made reconditions on Reserved Instances to save money on AWS » Fully Automated Amazon Machine Images (AMIs) creation using Ansible » Reviewed current backup strategy and made reconditions to better survive more disaster scenarios and be more resilient. Currently implementing » Created a way to SSH into Linux using PKI keys » Mitigated security findings for Linux servers that was found on security scans » Responsible as Tier 3 for any Linux or Windows server for any technical issues Show less

    • United States
    • IT Services and IT Consulting
    • 1 - 100 Employee
    • Sr. Cloud Architect
      • Feb 2016 - Dec 2016

      • Implemented Ansible to automate infrastructure and server deployment • Designed a strategy to change the organization to a DevOps model • Advise team of engineers on the best practices on AWS • Create IAM roles that follow least privilege guidelines for users • Lead a team of architects and engineers to migrate applications from on premise to AWS Cloud • Redesigned applications to be optimized on AWS • Implemented Ansible to automate infrastructure and server deployment • Designed a strategy to change the organization to a DevOps model • Advise team of engineers on the best practices on AWS • Create IAM roles that follow least privilege guidelines for users • Lead a team of architects and engineers to migrate applications from on premise to AWS Cloud • Redesigned applications to be optimized on AWS

    • India
    • Motor Vehicle Manufacturing
    • Senior Cloud Support Engineer
      • Oct 2015 - Feb 2016

      • Created a redesign of an application to be optimized on AWS • Created whitepaper for RDS to inform the team of its uses • Researched cost analysis of using S3 and Glacier vs tape backup • Created and modified documents for a proposal to use AWS • Designed VPC network for AWS • Created a redesign of an application to be optimized on AWS • Created whitepaper for RDS to inform the team of its uses • Researched cost analysis of using S3 and Glacier vs tape backup • Created and modified documents for a proposal to use AWS • Designed VPC network for AWS

    • United States
    • IT Services and IT Consulting
    • 700 & Above Employee
    • IT Infrastructure Operations Engineer
      • Jan 2015 - Sep 2015

      • Configured a sandbox to represent the C2S cloud • Set up an AWS Workspace environment for a proposal • Assisted NASA with preparations for elevated permission management software • Configured ElasticSearch and developed a Ruby on Rails front end search page • Configured a sandbox to represent the C2S cloud • Set up an AWS Workspace environment for a proposal • Assisted NASA with preparations for elevated permission management software • Configured ElasticSearch and developed a Ruby on Rails front end search page

    • IT Services and IT Consulting
    • 1 - 100 Employee
    • Cloud Support Engineer
      • Aug 2013 - Jan 2015

      • Help customers engineer the best solution on AWS to use the right technology that will best suit their needs. This includes but not limited to EC2, EBS, S3, ELB, and VPCs • Facilitate and coordinate communication between service teams and management when critical issues occur. Bring in key resources to assist with the issue. Stick with the problem and ensure a resolution is found. • Assist customers with setting up their account, adhering to best practices • Review customer configuration to diagnose where an issue is located. • Create training material to teach other technicians on how to use AWS services • Documented the technical steps required to do repeatable tasks for others to execute to resolve issues. • Configured Exchange 2013 for auto discover and to use trusted certificates • Modified PowerShell scripts to configure new users, and disable old users • Installed and configure log monitoring software Splunk • Created security settings and GPO settings to lock down the AD domain Show less

    • IT Services and IT Consulting
    • 700 & Above Employee
    • Lead Server Administrator
      • Oct 2010 - Aug 2013

      • Decommissioned a rack of servers to be given back to the contract owner, in working order without the use of a Domain Controller. • Broke SQL cluster and rebuilt as a standalone SQL server • Wrote up documentation that included all server information and how to set up the network once the servers were given back to the client • Configured Dell Switch with vlan assignments • Created network diagram for future core and distribution switches • Installed Team Foundation 2010 for production use • Wrote up documentation on administering Team Foundation 2010 • Wrote up documentation comparing ticketing systems: OTRS and Spiceworks • Installed and test a ticketing system- OTRS, on Ubuntu as a cost effective alternative • Wrote up documentation on how to use OTRS • Researched alternative to current web proxy filter • Deployed web filter in test environment using WCCP to transfer web traffic transparently from a Cisco router to a proxy server using Squid and Dansguardian as a content filter. Built on Ubuntu • Reviewed current hardware architecture and made suggestions on how to improve the environment • Researched hardware and software pricing based upon requirements and cost • Upgraded VMWare to the latest version • Set up and configured an ISA load balancer • Researched ways to lower the surface area of attack for public facing websites and applications. Tested and implemented Microsoft UAG 2010 • Troubleshoot issues with outages and slowdowns in production Show less

    • United States
    • IT Services and IT Consulting
    • 1 - 100 Employee
    • Network Engineer
      • May 2008 - Nov 2008

      • Responsible for managing over 12 companies IT needs. • Answered phone calls and emails directly from clients, scheduling on and off site support, and on call support for non-business hours. • Duties for clients include: Installing and resolving technical issues for servers, workstations, network equipment, and networking cables. • Created visio network diagrams and detailed documentation for major IT tasks like ISP change, migration of Exchange, and migration of Domain controllers. • Implemented migration of ISP, Exchange 2010, Domain Controllers, SQL, and other client specialized software. • Created domain architecture from the ground up. • Set up VMWare cluster servers storing the data on a SAN so that when a physical VMWare server fails, another VMWare server would automatically start up the offline virtual servers to minimize down time. • Set up an Oracle cluster on three Red Hat servers accessing data from a SAN. • Set up Citrix App Server to run Microsoft Office applications to remote locations with limited bandwidth. • Configured Microsoft’s DFS so that file access would have greater up time. • Configured a HTTP proxy server on Solaris. • Set up firewall and VPN access to Watchguard and Sonicwall firewalls. • Set up Symantec Antivirus manager and deployed the client agents through the manager to workstations. • Created start up scripts for network drives, WSUS updates, file redirection, and automatic installation of applications. • Set up Terminal server to only run a specific application upon logging into it. • Managed Blackberry Enterprise Server. • Also responsible for preventative maintenance. Show less

    • United States
    • Construction
    • 1 - 100 Employee
    • Director of IT
      • May 2008 - Nov 2008

      • Responsible for virtual servers on VMWare and desktops. • Complete IT overhaul, changed from physical servers to virtual servers on VMWare using VMWare’s Stand Alone Converter. • Managed Microsoft Window’s 2003 and 2008 servers that include Active Directory, Exchange 2003, Terminal server, VPN, File server, FTP server, Accounting server, and database server. • Replaced all network equipment to modern hardware. • Set up and configured Watchguard firewall. • Set up remote office and installed camera system to work in remote locations. • Manage workstations and firewalls in remote locations. • Set up and fixed issues with Smart board touch screen systems. • Resolved backup issues and set up tape rotation for better protection. Show less

    • Medical Practices
    • 1 - 100 Employee
    • Director of IT
      • Jun 2007 - May 2008

      • Responsible for all servers, computers, and thin clients to maintain stability and reliability. • Identified and resolved server issues. • Set up and configured Sonicwall firewall. • Tested and implemented migration of medical database software. • Researched the benefits of thin clients, than implemented the thin clients. • Resolved issues for lab equipment communicating with workstations. • Looked over and suggested upgrades for servers and workstations to perform optimally. • Monitor backup software. Show less

    • United States
    • Higher Education
    • 700 & Above Employee
    • IT Technician
      • Aug 2004 - May 2007

      • Went out to locations of those in the helpdesk queue to fix their problem. • Filled out work orders from phone calls and emails • Fixed Smart board issues. • Resolved workstation issues. • Tested equipment. • Went out to locations of those in the helpdesk queue to fix their problem. • Filled out work orders from phone calls and emails • Fixed Smart board issues. • Resolved workstation issues. • Tested equipment.

Education

  • Christopher Newport University
    Bachelor of Science (B.S.), Information Science/Studies Minor:Computer Science

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