Enterprise IT Architect w/ active Top Secret clearance

OverviewLMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and intel sectors—helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.ResponsibilitiesLMI is seeking a skilled Enterprise IT Architect to support the design and integration of enterprise IT and communications infrastructure across a network of new and existing secure facilities. The Enterprise IT Architect will define the target-state architecture, ensure interoperability across sites, and work with engineering leads and government stakeholders to translate mission requirements into scalable technical solutions. This is an execution-oriented role supporting a fast-paced, milestone-driven prototype effort with near-term deliverable commitments. Success requires systems-level thinking, technical judgment, effective communication, and the ability to balance mission needs, security, performance, cost, operational risk, and long-term sustainability. Primary duties include: Lead enumeration and documentation of the technical baseline across multiple geographically dispersed sites, including classified and unclassified network enclaves, transport, security boundaries, and cross-domain transfer capabilities. Design and develop target-state network and systems architectures for new secure facilities and an existing operational site, ensuring interoperability and compliance with federal security requirements. Develop security authorization roadmaps in accordance with the Risk Management Framework (NIST SP View phone number on click.appcast.io) in partnership with ISSO and security engineering leads. Define architecture for enterprise services, including end-user computing, classified and unclassified VTC/AV integration, and 24x7 network and security operations center (NOC/SOC) monitoring. Produce design documentation, technical sections of milestone deliverables, and cost and feasibility inputs supporting a priced follow-on proposal. Clearly articulate design decisions, alternatives considered, and associated tradeoffs — cost, schedule, security, and operational impact — to government sponsors and non-technical stakeholders, and support sponsor decision briefings and technical reviews. Develop current-state, transition-state, and target-state architectures across infrastructure, networking, cloud, data, applications, identity, cybersecurity, and operations. Provide technical governance while enabling engineering teams to make timely decisions within established architectural boundaries. Establish an enterprise automation strategy that standardizes repeatable processes, reducing manual effort to enable operational efficiency and enabling secure, scalable, and modern technology capabilities. Foundational Skills Enterprise and solution architecture principles. Systems thinking and requirements decomposition. Network, compute, storage, virtualization, cloud, data, application, and identity fundamentals. Security architecture, zero-trust principles, risk management, and defense in depth. Agnostic systems integration, interfaces, APIs, and data flows. Availability, redundancy, resilience, disaster recovery, and continuity of operations. Architecture modeling, technical documentation, and decision analysis. Technology lifecycle management and modernization planning. Cost, performance, risk, and operational tradeoff analysis. Location: This position is based in the Washington, DC metro area, with travel to program locations. Travel: This position requires approximately 25-50% travel to support activities across multiple program locations. Availability: Immediate availability strongly preferred; unclassified planning work may begin while program access nominations are processed. QualificationsRequired: Bachelor's degree in Computer Science, Information Technology, or related field. 8+ years of experience in enterprise IT architecture, including in classified environments. Strong understanding of network, systems, and security architecture principles. Demonstrated experience leading large, geographically dispersed teams. Experience architecting IT infrastructure for SCIF or other accredited classified environments, including multi-enclave network design. Working knowledge of the Risk Management Framework (NIST SP View phone number on click.appcast.io) and the security authorization process. Experience architecting solutions for SCIF or other classified facility environments. Nice to Have: Relevant certifications (e.g., TOGAF, CISSP, AWS/Azure architecture certifications). Experience integrating cross-domain solutions (CDS) into enterprise architectures. Experience supporting Special Access Program (SAP) facilities, systems, or environments. Experience designing classified and unclassified video teleconferencing (VTC) and conference room AV capabilities. Experience designing or standing up network or security operations centers (NOC/SOC), including 24x7 coverage models. TS/SCI clearance is required for this position - final adjudication is required and interim clearances will not be considered. Candidates must also be eligible for Special Access Program (SAP) access; Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information. LMI will only consider applicants with current TS/SCI security clearance. Please note that only U.S. citizens are eligible for a security clearance.The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances.  Approximate range of $100,000 - $220,000, subject to change based on the factors listed above. Job LocationsUS-DC-Washington, DCJob SummaryID: 2026-14314# of Openings: 1