Senior Windows Systems Engineer: Enclave, VMware & Cloud

Leidos; Chantilly (VA); On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos seeks a Senior Infrastructure Engineer to own and stabilize a hybrid environment spanning on-prem VMware infrastructure and AWS cloud. You will drive reliability for mission-critical systems in air-gapped, security-first networks with strict compliance requirements.

The role demands 12+ years of systems engineering experience, TS/SCI with Poly, and strong skills across Windows, VMware, AD, and security tooling. Expect 24/7 support responsibilities in a high-uptime environment.

Qualifications

• 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.

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 (Trellix, Rapid7, Security Onion, 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.

Skills

Windows servers

High availability

Air-gapped environments

Troubleshooting OS/Net/Storage

Tools

VMware vCenter/ESXi

AWS EC2/VPC

SCCM/WSUS

Rubrik

Active Directory

Citrix

PowerShell/Bash scripting

Job description

Leidos seeks a Senior Infrastructure Engineer to own and stabilize a hybrid environment spanning on-prem VMware infrastructure and AWS cloud. You will drive reliability for mission-critical systems in air-gapped, security-first networks with strict compliance requirements.

The role demands 12+ years of systems engineering experience, TS/SCI with Poly, and strong skills across Windows, VMware, AD, and security tooling. Expect 24/7 support responsibilities in a high-uptime environment.