Senior OT/ICS Systems Administrator – Lead

Unofficial M.C. Dean; Fairfax (VA); On-site; USD 104,000 - 130,000; Full time

Job summary

M.C. Dean is seeking a Senior Systems Administrator and technical lead for secure OT/ICS infrastructure in the Tysons, VA area. You will guide the lifecycle from bidding to commissioning, ensuring high availability, cybersecurity, and compliance with RMF/STIGs.

You will coordinate with estimating, engineering, cybersecurity, and field teams to deliver mission-critical solutions. The role requires extensive experience with VMware, Hyper-V, Windows Server, AD, and storage/backups, plus strong

Qualifications

• Education and clear experience in enterprise OT/ICS environments.

Responsibilities

• Owns the solution lifecycle from bidding and design through implementation.
• Coordinate with stakeholders across multiple teams and vendors.
• Develop design packages, including architecture diagrams and BOMs.
• Harden, patch, and manage OT/ICS infrastructure and cybersecurity controls.
• Lead FAT/SAT, testing, and customer turnover; provide technical direction.

Skills

Customer-facing comms

Technical leadership

Microsoft Office suite

Education

Bachelor's degree +5+ yrs

Associate’s degree +8+ yrs

High School diploma +10+ yrs

Tools

VMware vSphere/ESXi

Microsoft Hyper-V

Windows Server

Active Directory

Group Policy

DNS/DHCP

Patching and STIGs

RMF/DoD guidance

Veeam/Commvault/Rubrik

NetApp/Dell/HPE storage

SQL Server

PowerShell

Job description

M.C. Dean is seeking a Senior Systems Administrator and technical lead for secure OT/ICS infrastructure in the Tysons, VA area. You will guide the lifecycle from bidding to commissioning, ensuring high availability, cybersecurity, and compliance with RMF/STIGs.

You will coordinate with estimating, engineering, cybersecurity, and field teams to deliver mission-critical solutions. The role requires extensive experience with VMware, Hyper-V, Windows Server, AD, and storage/backups, plus strong