Sr. Systems Engineer

INFORMATION SYSTEMS SOLUTIONS, INC•Charleston, SC

10d•Onsite

About The Position

The Senior Systems Engineer will support 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. The role centers on Windows Server ecosystems, identity and access management, system hardening, and compliance enforcement, with responsibility for maintaining highly available, secure, and scalable infrastructure. The engineer will lead system-level vulnerability remediation efforts, RMF compliance activities, and enforcement of DISA STIG baselines across enterprise environments. This is a senior, hands-on engineering role requiring deep expertise in Windows internals, Active Directory design, Group Policy architecture, and enterprise cybersecurity practices. The candidate must independently resolve complex system issues, guide technical decisions, and contribute to architecture and engineering strategies across the environment.

Requirements

Seven (7) years of experience in systems engineering and support for IT and C4I systems.
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): One of the following: CompTIA CySA+, CompTIA Security+, CCNA - Security, GICSP, GSEC, SSCP
Operating System Certificate (e.g., Linux+, Windows Server, CCNA, etc.)

Nice To Haves

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 (desired, not required)
Demonstrated ability to lead engineering efforts and influence architecture decisions
bachelor’s or master’s degree desired in engineering (e.g., network, electrical, mechanical, systems, etc.)

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