Senior Platform Engineer - w/active Top Secret clearance

LMI•Washington, DC

4d•$125,000 - $220,000•Onsite

About The Position

LMI is seeking a Senior Platform Engineer to lead the design and integration of hybrid cloud and on-premises computing platforms for federal customers and classified environments. The role emphasizes on-premises cloud infrastructure for compute, storage, and application hosting, with secure remote connectivity through external cloud services where permitted by customer security requirements, authorization, and cross-domain solutions (CDS). The engineer will provide expertise across cloud computing, virtualization, containerization, enterprise infrastructure, and platform integration to deliver secure, reliable capabilities that support customer missions. As a senior technical authority, the engineer will work with technical architects, systems engineers, cybersecurity specialists, networking engineers, and other subject matter experts to evaluate platform technologies, develop infrastructure designs, coordinate CDS considerations, and recommend technical solutions. The role translates customer requirements into practical platform designs and presents recommendations to program leadership and customer stakeholders. The position combines technical leadership, platform engineering, and customer engagement. The Senior Platform Engineer will guide implementation and validation, support technical planning, identify engineering resource needs, assist with recruiting and building project teams, and advise throughout solution implementation. The position is based in the Washington, DC metro area, with approximately 25–50% travel to program locations.

Requirements

Bachelor's degree in Computer Science, Information Technology, Engineering, or a related discipline, and 10 or more 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 for 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, 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, and advising technical teams and communicating solutions to customers and program leadership.
Experience using infrastructure automation and configuration management to support repeatable deployment and maintenance.
Active TS/SCI security clearance; TS/SCI clearance with SAP eligibility is required. Applicants must have a current clearance and be eligible for access to classified information. Only U.S. citizens are eligible for a security clearance.
Approximately 25–50% travel to program locations.

Nice To Haves

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 for federal customer requirements and proposals.
Relevant professional certifications, such as AWS Certified Solutions Architect – Professional, Microsoft Certified: Azure Solutions Architect Expert, CISSP, or CCSP.

Responsibilities

Collaborate with customers and technical stakeholders to identify platform requirements, assess existing infrastructure, and translate mission objectives into technical solutions.
Evaluate platform availability, capacity, remote access, operational constraints, integration dependencies, security requirements, and technical risks.
Design and guide implementation of secure, scalable computing, hybrid cloud, and on-premises architectures covering 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 recommend solutions that support customer mission requirements.
Evaluate and recommend accredited cross-domain solutions (CDS) for information exchange across classified environments.
Assess platform interfaces, integration requirements, security boundaries, and technical dependencies for CDS integration with cybersecurity, networking, and engineering specialists.
Develop architectural designs and diagrams, implementation plans, technical solution concepts, and engineering recommendations.
Assess technical feasibility and integration, document solution alternatives, and present recommendations to program leadership and customer stakeholders.
Incorporate applicable security controls, configuration standards, and authorization requirements into platform designs.
Guide integration testing, configuration validation, and transition to operations.
Develop technical specifications, repeatable deployment procedures, and documentation supporting solution development and implementation.
Plan and implement procedures supporting transition to and from continuity of operations.
Support technical planning, identify engineering resource requirements, assist in recruiting and building project teams, and serve as a senior technical advisor during implementation.