Looking for a job

Derek Chandler

@derekchandler

Senior Systems Administrator at Marathon TC supporting the U.S. Air Force ERP Sustainment Program across classified and unclassified environments.

United States

Message

At Marathon TC, I administer and maintain infrastructure for the U.S. Air Force ERP Sustainment Program across classified and unclassified environments. I manage Nutanix and Citrix platforms and Windows Server systems, including deploying Windows Server 2019 and retiring legacy Windows Server 2012 R2 infrastructure.

I support enterprise cybersecurity through SCAP and ACAS vulnerability assessments, DISA STIG implementation, and security patching for Windows and Red Hat Enterprise Linux systems. I also developed and deployed standardized Windows 10 and Windows 11 gold images for virtual desktop infrastructure.

At SAIC, I supported deployable IT systems communicating over satellite and assisted with automating enclave builds. I implemented more than 15 Microsoft Azure instances and migrated 1,000+ users from on-premises Exchange to Office 365.

Earlier, I taught IT and cybersecurity at North Bay Haven Charter Academy, where I helped students prepare for industry certifications. Across my systems administration work, I’ve supported Department of Defense environments, maintained virtual infrastructure, and produced technical documentation and operating procedures.

Experience

Work history, roles, and key accomplishments

Current

Senior Systems Administrator

Current

Marathon TC

Oct 2024 - Present (2 years)

Administered and maintained mission-critical infrastructure for the U.S. Air Force ERP Sustainment Program, including virtualization platforms, Windows Server, and cybersecurity compliance. Managed a 350-server VDI environment and implemented DISA STIGs and vulnerability remediation.

Senior Systems Administrator

Leidos Inc.

Feb 2023 - Oct 2024 (1 year 8 months)

Administered and maintained systems on the Nutanix stack for the classified environment at Tyndall Air Force Base, including building and deploying Windows Server 2019 and decommissioning 2012 R2 servers. Performed vulnerability scans, implemented STIGs, and supported network administration for NORAD.

High School Teacher

North Bay Haven Charter Academy

Aug 2022 - Mar 2023 (7 months)

Taught Digital Media, IT Fundamentals, Cybersecurity Essentials, Operational Cybersecurity, and AP Computer Science Principles. Prepared students for industry certifications, with notable success in CompTIA Security+ and IT Fundamentals.

CompTIA Security+ITF+AP Computer Science Principles Curriculum Development Teaching

Senior System Administrator

SAIC

Feb 2022 - Aug 2022 (6 months)

Administered and maintained deployable IT systems for the JEXC2 contract, integrating patches and automating enclave builds. Migrated over 1000 users to O365 and implemented Azure instances for satellite-fed systems.

PowerShell Ansible Python Jinja Azure Office 365 SharePoint Teams MECM ACAS Group Policy DISA STIGs SaaS PaaS IaaS

System Administrator

TEK Systems, LLC

Aug 2021 - Jan 2022 (5 months)

Maintained the health of the Icehouse Network for the 83rd Fighter Wing, implementing STIGs, scanning for vulnerabilities with ACAS, and patching with MECM. Managed a virtual environment of 4 physical servers with 48 hosts each.

ACAS Nessus WSUS MECM SCCM Group Policy DISA STIGs VMWare VSphere Virtual Desktop Infrastructure Windows Server

Hypori Service Desk Engineer

Spathe Systems, LLC

Dec 2020 - Aug 2021 (8 months)

Provided Tier III support for the DoD classified network SIPR, implementing Hypori for BYOD mobility. Migrated over 10,000 users to O365 using Azure and Intune, and developed training and SOPs.

Hypori Azure Intune Office 365 Azure Active Directory Remedy SIPRNet Bring Your Own Device Service Desk Troubleshooting

eDiscovery Systems Engineer

By Light

Apr 2020 - Dec 2020 (8 months)

Maintained and updated two-thirds of CENTCOM's Windows Server environments for the enterprise Records Management team. Managed a virtual environment of 24 physical servers with 210 hosts, and used vSphere for monitoring and patching.

VSphere VMWare Microsoft Windows 2012 2016 2019 Linux Control Point Content Manager ActiveNav eDiscovery Virtualization

eDiscovery Systems Engineer

Venatore

Dec 2018 - Apr 2020 (1 year 4 months)

Provided support on multiple DoD networks, maintaining and updating CENTCOM's Windows Server environments. Configured and administered 14 Windows 2012 servers and 10 Linux servers, and utilized VMware for patching and updates.

VMWare VSphere Windows Server 2012 Linux Control Point Content Manager ActiveNav eDiscovery Agile Virtualization

Client Support Technician

GDIT

Mar 2018 - Dec 2018 (9 months)

Provided client support on multiple DoD networks, supporting 1800 Air Force users. Established Elevated Rights accounts for the Air Force's CFP and used BMC Remedy for ticket management.

BMC Remedy Account Management Troubleshooting Virtual Desktop Infrastructure Wireless Networks Windows

Senior Exchange System Administrator

GDIT: ARMA Global

Sep 2016 - Mar 2018 (1 year 6 months)

Provided Exchange Mail support on multiple DoD networks, supporting 60,000 users worldwide. Managed 140 Exchange servers, performed patch rollouts, and assisted in migration from Exchange 2010 to 2013.

Microsoft Exchange 2010 2013 VMWare VSphere PowerShell BMC Remedy Windows Server 2008 2012 R2 Active Directory

Switch Technician / Automation Supervisor

USA Army

Aug 1996 - Sep 2016 (20 years 1 month)

Supervised the automations shop, analyzing and troubleshooting network server systems to ensure security and integrity. Managed network maintenance, performed software upgrades, and provided support for 1200 users.