We are seeking a Subject Matter Expert (SME) Solution & Systems Integration Architect to join our team supporting a large-scale federal modernization program. This role owns end-to-end solution architecture across complex, interdependent systems, translating mission and business requirements into secure, scalable, supportable technical designs, and carrying those designs through review, implementation, and operational transition. This is a hands-on architecture role. You'll be expected to produce real architecture views and decision artifacts, not just set direction from a distance. This is a hybrid role based out of Washington, DC. Candidates must be U.S. citizens. Key Responsibilities 1. Solution Architecture & Design • Translate mission and business requirements into secure, scalable, supportable architectures and technical baselines. • Develop and review context, logical, physical, component, interface, deployment, integration, and transition views at the level required for decisions and implementation. • Apply approved patterns, common services, reference architectures, and reusable design approaches. 2. Design Reviews & Trade Studies • Lead or participate in architecture compliance reviews, technical design reviews, and implementation-readiness reviews. • Conduct trade studies and analyze alternatives involving cloud adoption, modernization, technical debt, rationalization, interoperability, resilience, and cost. 3. Risk Identification • Identify interface, dependency, performance, security, data, platform, network, and operational risks early in the design process. • Flag lifecycle risks and dependencies before they affect delivery. 4. Cross-Domain Coordination • Coordinate engineers and specialists across platform, network, security, data, mobility, and ITSM teams to align architecture with delivery. • Resolve cross-vendor and cross-organizational design conflicts under fixed milestones. 5. Compliance & Rationalization • Ensure designs align with enterprise architecture standards, governance, and compliance requirements. • Support application rationalization and legacy modernization efforts. 6. Transition & Documentation • Support problem resolution during testing, deployment, transition, operations, and post-implementation stabilization. • Maintain architecture decisions, deviations, assumptions, dependencies, diagrams, and interface records in approved repositories. • Produce clear diagrams and decision artifacts, and explain tradeoffs to engineers, program managers, and executive stakeholders. Requirements • 12+ years of IT experience, including at least 5 years designing or governing complex enterprise solutions. • Bachelor's degree in a technical discipline or equivalent relevant experience. • Demonstrated architecture experience across at least three of the following domains: application, integration, data, cloud/platform, network, cybersecurity, endpoint/mobility, identity, ITSM, or operations. • Experience with interfaces/APIs, dependencies, nonfunctional requirements, security and operational constraints, technical reviews, and implementation readiness. • Ability to create clear diagrams and decision artifacts and explain tradeoffs to engineers, program managers, and executives. • U.S. Citizenship Required. Nice to Have • Direct federal, government, or large-scale system-of-systems modernization experience. • Experience with Sparx Enterprise Architect, Prolaborate, ArchiMate, UML, SysML, BPMN, or equivalent modeling tools/notations. • Cloud, integration, architecture, or systems-engineering certifications. • Experience with shared services, platform engineering, event/API integration, application rationalization, legacy modernization, and zero-trust-aligned designs. • Experience resolving cross-vendor or cross-organizational design conflicts under fixed milestones. Benefits • 401(k) • 401(k) matching • Dental insurance • Flexible spending account • Health insurance • Life insurance • Paid time off • Professional development assistance • Referral program • Tuition reimbursement • Vision insurance