Tier 3 Platform Engineer SME

Peraton Overview Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace.

The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit  to learn how we’re keeping people around the world safe and secure.

Responsibilities

Schedule:

Rotating shifts within a 6:00 AM to 6:00 PM, seven-day on-site coverage window, plus participation in a shared after-hours on-call rotation.

About the Role Peraton is seeking a Platform Engineer Subject Matter Expert (SME) to provide senior technical leadership for the operation, engineering, and sustainment of a mission-critical enterprise software platform supporting an Intelligence Community customer. The platform delivers a standardized developer and user experience across multiple classified enclaves, leveraging a zero trust, hub-and-spoke architecture.

The Platform Engineer SME will establish technical direction for platform operations, oversee complex engineering and sustainment activities, and serve as the senior technical authority for Tier 3 escalations and major incident response. This role will guide platform reliability, automation, infrastructure optimization, and operational excellence while ensuring engineering solutions align with enterprise architecture, security requirements, and mission  addition to hands-on technical leadership, the SME will serve as a shift lead, coordinating engineering and operational activities, mentoring technical personnel, and driving resolution of enterprise-wide issues.

The SME will work closely with program leadership, architecture, cybersecurity, and partner organizations to ensure the platform remains secure, resilient, and available to mission users.

What You Will Do Establish technical direction and engineering standards for the deployment, operation, and sustainment of enterprise platform infrastructure and shared services.

Lead the design, implementation, and optimization of platform capabilities across hybrid cloud and on-premises environments, including Kubernetes-based container orchestration platforms.

Provide technical oversight of infrastructure as code, configuration management, automation, and CI/CD pipeline capabilities to ensure secure, scalable, and repeatable deployments.

Guide implementation and sustainment of zero trust security controls, including identity-aware access, network segmentation, and least-privilege policies.

Oversee technical onboarding and integration of mission tenants, applications, and shared services across the enterprise platform.

Evaluate platform architecture, engineering practices, and operational processes to identify opportunities to improve availability, scalability, resiliency, security, and performance.

Serve as the senior technical escalation authority for complex platform incidents involving compute, storage, networking, identity, cloud infrastructure, and container orchestration.

Lead major incident response activities, coordinating technical resources, engineering teams, vendors, and partner organizations to restore mission services within established service levels.

Direct root cause analysis and corrective action efforts for significant incidents, ensuring systemic issues are addressed through engineering improvements and automation.

Establish operational standards, technical procedures, and escalation practices to improve incident response and reduce recurring service disruptions.

Provide technical oversight of observability capabilities, including centralized logging, metrics, alerting, dashboards, and platform health monitoring.

Partner with cybersecurity leadership to ensure platform security controls, continuous monitoring, and technical evidence remain aligned with RMF authorization and continuous ATO requirements.

Provide technical leadership and mentorship to Senior and Mid-Level engineers, establishing expectations for engineering quality, troubleshooting, documentation, and…