Sr. Systems Engineer with Security Clearance

About the role

The Senior Systems Engineer supports a Navy enterprise command-and-control environment in Charleston, SC. This position serves as a senior technical authority responsible for the design, engineering, hardening, and lifecycle management of enterprise Windows environments within secure DoD networks.

Responsibilities

• Engineer and administer enterprise Windows Server environments (2016/2019/2022) within classified and DoD networks
• Architect, manage, and optimize Active Directory Domain Services (AD DS), including forests, domains, trust relationships, and replication topology
• Design and enforce Group Policy (GPO) strategy and configuration baselines across enterprise systems
• Implement and maintain Windows security hardening in accordance with DISA STIGs and DoD cybersecurity policies
• Serve as the technical lead for vulnerability assessment and remediation, leveraging ACAS scan results and system-level mitigation strategies
• Lead engineering efforts for system compliance, auditing, and continuous monitoring under RMF frameworks
• Develop advanced automation using PowerShell (primary) to support configuration enforcement, auditing, and remediation
• Support and optimize virtualized infrastructure (VMware vSphere/ESXi/vCenter) hosting Windows workloads
• Provide engineering support for Windows-based VDI environments, focusing on system performance, stability, and security
• Implement and manage identity, authentication, and access control mechanisms, including least privilege and privileged access strategies
• Troubleshoot and resolve complex Windows OS, AD, and infrastructure-level issues across lab and production environments
• Participate in architecture reviews, engineering boards, and configuration control processes
• Produce and maintain engineering documentation, including system designs, implementation plans, and compliance artifacts
• Mentor junior engineers and provide technical leadership within a multi-disciplinary team environment

Requirements

• Clearance Level TS/SCI (desired)
• OR an active SECRET clearance with a current SSBI/T5 investigation
• Candidates must be a U.S. citizen
• Certifications (IAT Level II): CompTIA CySA+, CompTIA Security+, CCNA - Security, GICSP, GSEC, SSCP
• Operating System Certificate (e.g., Linux+, Windows Server, CCNA, etc.)

Required Skills

• Seven (7) years of experience in systems engineering and support for IT and C4I systems
• Bachelor’s or master’s degree desired in engineering (e.g., network, electrical, mechanical, systems, etc.)

Desired Skills

• Advanced expertise in Active Directory architecture (multi-domain/forest design, replication, disaster recovery strategies)
• Deep understanding of Windows Server internals and enterprise infrastructure design
• Strong PowerShell development skills (modular scripting, automation frameworks, secure coding practices)
• Experience with hybrid identity solutions (Azure AD / Entra ID)
• Proven experience leading STIG implementation and compliance at scale
• Experience supporting classified DoD environments with privileged administrative access
• Familiarity with infrastructure-as-code concepts
• Demonstrated ability to lead engineering efforts and influence architecture decisions

Benefits

At ISS, we offer a comprehensive benefits package that includes a fully vested 401(k) matching program, coverage of family medical deductibles, spot bonuses, and educational assistance to further your career.