Senior Platform Engineer - w/active Top Secret clearance
Confirmed on the employer's own hiring board on Nov 5, 2026. First seen by Alion on Nov 4, 2026.
Overview
LMI 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, homeland, healthcare, and intelligence 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.
Responsibilities
LMI is seeking an experienced Senior Platform Engineer to lead the design and integration of hybrid cloud and on-premises computing platforms supporting federal customers and classified environments. This role focuses on on-premises cloud infrastructure for compute, storage and application hosting, with secure remote connectivity through external cloud services as permitted, by customer security, authorization, and cross-domain solutions (CDS), and developing scalable, secure infrastructure solutions that support customer mission requirements. The Senior Platform Engineer will provide technical expertise across cloud computing, virtualization, containerization, enterprise infrastructure, and platform integration to enable secure and reliable enterprise capabilities. Specifically- designing on-prem cloud infrastructure/platform for compute, storage and systems/apps; transport through external cloud services for remote connectivity.
The Senior Platform Engineer will serve as a senior technical authority for computing platform design and integration, working closely with technical architects, systems engineers, cybersecurity specialists, networking engineers, and other subject matter experts (SMEs) to develop comprehensive technical solutions. Key areas of responsibility include evaluating platform technologies, developing infrastructure designs, coordinating cross-domain (CDS), and technical solution recommendations, integrating with designated specialists, and incorporating security configurations and controls appropriate for classified computing environments. This individual will translate customer requirements into practical platform designs, and present technical recommendations to program leadership and customer stakeholders.
This position combines technical leadership, platform engineering, and customer engagement, requiring an individual capable of evaluating complex enterprise environments and developing practical, secure, and scalable platform solutions. The Senior Platform Engineer will guide platform implementation and validation, support technical planning, identify engineering resource requirements, and assist in recruiting and building project teams, and serve as a senior technical advisor throughout solution implementation. Success in this role requires broad enterprise architecture expertise, deep knowledge of cloud and infrastructure technologies, strong technical communication skills, and the ability to translate complex mission requirements into integrated, operationally sustainable solutions.
Primary duties include:
- Platform Requirements Discovery & Analysis: Collaborate with customers and technical stakeholders to identify platform requirements, assess existing infrastructure, and translate mission objectives into technical solutions. Evaluate availability, capacity, remote access, operational constraints, integration dependencies, security requirements, and technical risks.
- Enterprise Platform Architecture & Solution: Design and guide implementation of secure, scalable computing, hybrid cloud, and on-premises platform architectures incorporating, compute, storage, virtualization, containerization, and infrastructure automation. Prioritize on-premises cloud infrastructure and define interfaces with external cloud services for approved remote connectivity. Evaluate technology alternatives and solutions supporting customer mission requirements.
- Cross-Domain Solutions Evaluation & Integration: Evaluate and recommend accredited cross-domain solutions (CDS) to enable information exchange across classified environments. Assess platform interfaces, integration requirements, security boundaries, and technical dependencies for CDS integration in coordination with cybersecurity, networking, and engineering SMEs. Support solution evaluation and integration within customer authorization requirements.
- Technical Solution Development & Customer Engagement: Develop architectural designs and diagrams, implementation plans, technical solution concepts, and engineering recommendations in response to customer requirements. Assess technical feasibility and integration, and document solution alternatives, and present recommendations to program leadership and customer stakeholders.
- Platform Security, Validation & Documentation: Incorporate applicable security controls, configuration standards, and authorization requirements into platform designs. Guide integration testing, configuration validation, and transition to operations. Develop technical specifications, and repeatable deployment procedures. Integrate documentation to support solution development and implementation. Plan and implement procedures to support transition to and from continuity of operations.
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.
Qualifications
Required:
- Bachelor's degree in Computer Science, Information Technology, Engineering, or related discipline and 10+ years of relevant platform engineering, infrastructure, or solution architecture experience. Equivalent education and experience may be considered.
- Demonstrated experience designing enterprise platforms across hybrid cloud, on-premises, and classified computing environments supporting DoD, Intelligence Community, or other federal customers.
- Strong knowledge of cloud infrastructure, including AWS GovCloud and/or Azure Government, with expertise in at least one major cloud platform and familiarity with others.
- Experience with enterprise infrastructure technologies, including virtualization, containerization, networking, storage, constructing secure virtual private networks (VPN), and systems integration.
- Understanding of accredited cross-domain solutions (CDS), including evaluation, selection, integration, and security considerations.
- Working knowledge of federal security requirements, configuration controls, and accreditation frameworks, including NIST SP 800-53 and the Risk Management Framework (RMF).
- Experience developing technical architectures, solution recommendations, and engineering documentation, with demonstrated ability to advise technical teams and communicate solutions to customers and program leadership.
- Experience using infrastructure automation and configuration management to support repeatable deployment and maintenance.
- Active TS/SCI security clearance.
Preferred:
- Advanced experience designing enterprise architectures for classified DoD or Intelligence Community environments, including integration of accredited cross-domain solutions and computing platforms.
- Expertise with enterprise virtualization, container orchestration, and infrastructure automation technologies, including VMware, Kubernetes, Red Hat OpenShift, or comparable platforms.
- Experience leading technical solution development, architecture assessments, trade studies, and technical briefings supporting federal customer requirements and proposals.
- Relevant professional certifications, such as AWS Certified Solutions Architect - Professional, Microsoft Certified: Azure Solutions Architect Expert, CISSP, or CCSP.
Target salary range: $125,000.00 - $220,000.00. Final compensation will be determined by a variety of factors including but not limited to your skills, experience, education, and/or certifications.
TS/SCI clearance with SAP eligibility is required for this position.TS/SCI clearance with SAP eligibility is required for this position. 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 security clearances. Please note that only U.S. citizens are eligible for a security clearance.