Systems Architect, SME

About this role

Type of Requisition: Regular

Clearance Level Must Currently Possess: Top Secret

Clearance Level Must Be Able to Obtain: Top Secret/SCI

Public Trust/Other Required: None

Job Family: IT Infrastructure and Operations

Job Qualifications: Skills: Enterprise Infrastructures, Enterprise Systems, System Infrastructure, Systems Design, Virtualization Certifications: None Experience: 15 + years of related experience US Citizenship Required: Yes

Job Description: We are seeking a strategic Systems Architect SME to lead a highly technical team of systems, network, software and database engineers supporting the Defense Threat Reduction Agency's (DTRA) Defense Stockpile Management System (DSMS) Enterprise. This program provides full lifecycle sustainment for a system supporting accountability and reporting for DTRA's Nuclear Enterprise Directorate. In this role, you will serve as the program's technical lead and senior advisor to Program Management, overseeing the reliability, security, and modernization of the DSMS enterprise infrastructure, including the DIAMONDS system of record, the JADE development environment, and the NIMACS application platform. You will serve as the critical bridge between technical execution and Government stakeholder requirements, guiding the enterprise modernization roadmap, including the ongoing JADE-to-Azure IL5 cloud migration, while ensuring seamless collaboration across all IT engineering disciplines in a highly secure, regulated environment governed by DoW Risk Management Framework and continuous Authority to Operate (ATO) requirements.

WHAT YOU WILL DO: Core Priorities & Responsibilities • Serve as the Technical Lead for the program, providing senior technical advisory support to the Program Manager and Deputy Program Manager on architecture decisions, technical risk, resource trade-offs, and modernization priorities across all task areas.

• Represent the technical position of the program in Government management reviews, technical exchange meetings, and design review boards, and translate technical risk into terms Program Management can be used to inform cost, schedule, and staffing decisions.

• Direct, mentor, and empower a team of systems administrators and infrastructure engineers, driving operational excellence, workload prioritization, and technical skill development in support of a 99.7% monthly operational availability requirement across the DIAMONDS Enterprise and Central/Core virtual computing environments.

• Drive the architectural design and health of a complex environment, including but not limited to VMware vSphere (vSAN, vROPs, SRM, vRA, Horizon VDI), Windows core service servers, Red Hat Enterprise Linux, 3rd party applications, IIS, Tomcat Apache, and databases (Microsoft SQL Server, Oracle). Support the DIAMONDS, JADE, and DATS operating environments, including Dell EMC server hardware and Cisco network devices.

• Enforce strict security governance across the enterprise systems infrastructure. Ensure continuous compliance with DISA STIG security policies and implementation scheduling, manage the Plan of Action and Milestones (POA&M), update System Security Plan and Risk Management Framework (RMF) control documentation, manage PKI certificate servers, Active Directory, Group Policy, and oversee RSA user authentication servers.

• Support the planning, design, and fielding of Zero Trust architecture and Comply-to-Connect (C2C) requirements in accordance with mandated DoW policy deadlines.

• Break down silos by partnering closely with Network Engineering, Cybersecurity, Application Development, Database Administration, Field Support, and the DIAMONDS Support Center (DSC) to deliver cohesive, highly available services across all task areas.

• Support quarterly Disaster Recovery switchover testing, meeting a two-hour Recovery Time Objective (RTO) and Recovery Point Objective (RPO) and translate complex stakeholder requirements into actionable modernization strategies.

• Bridge the gap between legacy infrastructure constraints and future-state performance and security goals, including support for the migration of the JADE environment from on-premises infrastructure to the J6 IL5 Azure cloud.

• Develop and maintain DoD Architecture Framework (DoDAF) artifacts for all network, host, workstation, and database systems, and support formal Government design reviews with zero major rework.

• Support enterprise lifecycle management activities, including hardware and software refresh planning, end-of-life tracking, and cost estimation for full lifecycle refresh, ensuring 180-day advance alerts for all affected items.

WHAT YOU’LL NEED TO SUCCEED: Bring your technology expertise and drive for innovation to GDIT. The Systems Architect SME must have proven work experience in these areas of IT expertise along with these current IT certifications: • Skills: Enterprise Infrastructure Architecture, Virtualization Engineering (VMware vSphere), DoDAF Systems Design, RMF/Continuous ATO Compliance, Zero Trust Architecture

• Certifications: DoW 8140 IAT Level II required (e.g., Security+ CE or equivalent) at time of hire. VMware Certified Professional (VCP) preferred. CMMI-DEV/SVC Level 3 process familiarity preferred.

Minimum Qualifications • BA/BS degree or equivalent, and 15+ years of related work experience.

• Proven experience serving as a technical lead or chief architect advising program or senior management on technical strategy, risk, and resourcing decisions on a large, complex IT program, ideally within a Defense or Intelligence Community operational setting.

• Proven experience managing, leading, and mentoring technical teams (systems administrators, infrastructure engineers, or similar) in an enterprise environment.

• Deep technical expertise managing mixed operating system environments, specifically Red Hat Enterprise Linux (RHEL) and Windows Server, within a DISA STIG-compliant environment.

• Hands-on architectural experience with enterpris

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