Windows Systems Administrator
About The Position
We are seeking a Senior Infrastructure Engineer to support and operate mission-critical, enclave-based environments across on-premises VMware infrastructure and AWS cloud . This role sits at the center of a high-security, high-availability ecosystem , supporting systems where downtime has real operational impact . You will be responsible for owning, stabilizing, and improving a complex hybrid environment consisting of both legacy and modern platforms . This is not a passive support role—this is for someone who can step in, take control of the environment , and drive reliability and performance forward .
Requirements
- Must have at least 12 years of experience in systems engineering or infrastructure engineering
- Active TS/SCI with Poly
- Strong experience supporting Windows enterprise environments
- Proven experience in high-availability / mission-critical systems
- Experience operating in restricted, regulated, or air-gapped environments
- Strong troubleshooting skills across OS, virtualization, networking, and storage layers
- Ability to work independently and take ownership of complex systems
Nice To Haves
- PowerShell / Bash scripting
- Experience with compliance frameworks (STIGs, RMF, NIST)
Responsibilities
- Administer and maintain Windows-based infrastructure across enclave environments
- Manage VMware vCenter / ESXi (host performance, VM lifecycle, resource optimization)
- Support AWS cloud infrastructure (EC2, VPC, storage, IAM fundamentals)
- Maintain and troubleshoot Active Directory, Group Policy, and identity systems
- Oversee patching and system compliance via WSUS and SCCM
- Administer Microsoft Exchange and Citrix environments
- Maintain DNS, networking, and core infrastructure services
- Support and optimize SAN storage environments
- Manage backup and recovery operations using Rubrik
- Support and troubleshoot security platforms , including: Trellix ePO Rapid7 Security Onion IDS Centrify
- Perform deep-dive troubleshooting and root cause analysis across systems
- Maintain system documentation, SOPs, and incident response procedures
- Identify and implement infrastructure improvements and automation opportunities
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
Number of Employees
5,001-10,000 employees
