System Architect

SITEC Consulting•West Springfield, VA

15h

About The Position

SITEC Consulting is seeking an experienced System Architect - Enterprise Cross Domain Systems (ECDS) to support the architecture, modernization, integration, and sustainment of complex enterprise systems within a mission-critical Department of Defense environment. This position will provide technical leadership for the design and evolution of enterprise architectures spanning cross-domain capabilities, cybersecurity infrastructure, networks, Windows/Linux platforms, and cloud environments. The ideal candidate is a senior technical professional who can evaluate existing environments, translate mission and technical requirements into scalable system architectures, define future-state solutions, and guide engineering teams through implementation and modernization activities. This is an architecture-focused position requiring sufficient hands-on technical depth to understand implementation challenges, evaluate technology solutions, resolve complex integration issues, and provide technical direction across multiple engineering disciplines.

Requirements

Active TS/SCI clearance with the ability to obtain a polygraph.
6+ years of relevant technical experience supporting system architecture, enterprise architecture, cybersecurity engineering, systems engineering, network engineering, or related disciplines within complex enterprise environments.
Demonstrated experience designing, integrating, or modernizing complex enterprise systems, preferably within DoD, Intelligence Community, or other classified environments.
Experience developing system or solution architectures involving multiple infrastructure, network, security, application, or cloud components.
Strong understanding of enterprise networking, cybersecurity architecture, compute, storage, transport, and system integration principles.
Experience working with Windows and Linux server environments.
Technical knowledge of enterprise cybersecurity technologies such as NDR, EDR, NGFWs, IDS/IPS, F5 platforms, security gateways, or comparable enterprise security capabilities.
Experience developing architecture diagrams, technical designs, interface documentation, capability roadmaps, test strategies, or other engineering artifacts.
Experience evaluating technology solutions and making architectural recommendations based on technical, operational, cybersecurity, and mission requirements.
Ability to communicate complex technical concepts and architecture decisions to engineers, program leadership, government stakeholders, and senior decision-makers.
Ability to independently lead technical analysis and architecture activities with limited direction.
DoD 8140.01 / 8570.01-M certification alignment for IAT Level III and IASAE Level II, as required by the position.
Ability to obtain required CSSP-Analyst certification within 120 days of start date, if applicable to assigned duties.

Nice To Haves

Experience designing or supporting Cross Domain Solutions (CDS) or systems operating across multiple security domains.
Experience supporting Enterprise Cross Domain Systems within DoD or Intelligence Community environments.
AWS infrastructure or cloud architecture experience, including familiarity with EC2, EBS, ELB, S3, RDS, AMIs, networking, and cloud security concepts.
Experience with hybrid on-premises/cloud architectures.
Experience supporting RMF, ATO, security assessments, authorization activities, or external assessor coordination.
Experience developing current-state and future-state architectures, transition roadmaps, architecture decision records, interface designs, or system-of-systems documentation.
Experience providing technical leadership to multidisciplinary engineering teams.
Experience supporting modernization of large-scale, classified, mission-critical, or globally distributed enterprise systems.

Responsibilities

Develop and maintain system, enterprise, and solution architectures supporting Enterprise Cross Domain Systems and associated cybersecurity capabilities.
Analyze mission, operational, security, and technical requirements and translate them into architecture designs, system requirements, interfaces, and implementation strategies.
Define current-state, transition-state, and target-state architectures for modernization of complex enterprise environments.
Design solutions spanning on-premises infrastructure, cloud services, Windows/Linux platforms, networking, cybersecurity technologies, and cross-domain environments.
Develop architecture artifacts including system diagrams, network and data-flow diagrams, interface documentation, technical standards, implementation strategies, test plans, and capability roadmaps.
Define system interfaces, dependencies, security boundaries, information flows, and integration requirements across enterprise environments.
Evaluate existing and emerging technologies and recommend solutions based on mission requirements, cybersecurity, scalability, interoperability, performance, resiliency, and lifecycle considerations.
Provide architectural guidance for the integration of enterprise cybersecurity technologies such as NDR, EDR, next-generation firewalls, IDS/IPS, F5 platforms, and email/web security capabilities.
Support architectures incorporating AWS services such as EC2, EBS, ELB, S3, RDS, and related cloud capabilities.
Provide technical direction to engineering and implementation teams responsible for system deployment, configuration, integration, testing, and sustainment.
Review proposed infrastructure, application, network, and security changes for architectural compatibility and technical risk.
Support modernization efforts involving technology upgrades, infrastructure migrations, capability enhancements, and transition of legacy systems.
Identify architecture-level technical risks, constraints, dependencies, performance considerations, and capacity requirements and develop appropriate mitigation strategies.
Support security assessments, RMF/ATO activities, authorization efforts, and coordination with government stakeholders and external assessors.
Collaborate with systems engineers, cybersecurity engineers, network engineers, cloud engineers, software teams, security personnel, and government stakeholders to ensure solutions meet enterprise architecture and mission requirements.
Lead technical exchanges, design reviews, architecture reviews, and engineering discussions with technical and senior-level stakeholders.
Serve as a technical lead or architecture lead for assigned capabilities, projects, or modernization initiatives as required.