Senior Systems Administrator - Lead AD/VMware & Secure Infra

Caelum Research Corporation; Maryland; On-site; USD 110,000 - 130,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Life Insurance

Short and Long Term Disability

Paid Leave

Holidays

401(k) Retirement Plan

Tuition/Training Assistance

Job summary

Caelum Research Corporation is seeking a Senior Systems Administrator at Aberdeen Proving Ground, MD, to lead Windows/AD administration, VMware management, and security configurations in a DoD contract environment.

The role requires a Master’s degree, Security+CE, and 5+ years of leadership in large IT settings; expertise in AD, VMware, and scripting is essential for system optimization and rapid incident response.

Qualifications

• Master’s Degree in a directly related field and at least 5 years' experience; lower-level degrees with additional experience considered.
• Must possess a Security+CE (or equivalent DOD Directive 8570.1 IAT II)
• Must hold at least one Computing Environment certification (e.g. MCSE, MCSA) or obtain within 6 months
• Five+ years of experience leading five or more employees
• Expertise in Active Directory configuration and policy administration
• Experience with VMware and troubleshooting/monitoring
• Experience with TCP/IP, firewalls and routing
• Experience with performance tuning, capacity planning and high-availability systems
• Experience with automated build/deploy/configuration management and enterprise monitoring

Responsibilities

• Configure and administer Windows AD including policy management
• Administer Windows Server systems, troubleshoot and support
• Manage VMware environment including deployment, patching and hardening
• Monitor Windows events and performance on hosted systems
• Resolve complex configuration and networking issues
• Handle security issues including identity management and retention policies
• Write and use scripts in Bash, PowerShell, Python, Ruby, or Perl
• Support high-availability, clustered systems and load balancing
• Maintain storage environments and CISCO UCS integration
• Support HBSS configuration management and troubleshooting

Skills

Active Directory

Scripting

Networking

Windows Server

Performance tuning

Capacity planning

Troubleshooting

Education

Master’s Degree

Security+CE

CE certification (e.g. MCSE, MCSA)

Tools

VMware

Linux

Cisco UCS

Job description

Caelum Research Corporation is seeking a Senior Systems Administrator at Aberdeen Proving Ground, MD, to lead Windows/AD administration, VMware management, and security configurations in a DoD contract environment.

The role requires a Master’s degree, Security+CE, and 5+ years of leadership in large IT settings; expertise in AD, VMware, and scripting is essential for system optimization and rapid incident response.