Tier 3 Platform Engineer

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 Mid-Level Platform Engineer to support the development, operation, and sustainment of a mission-critical enterprise software platform for an Intelligence Community customer. The platform provides a standardized developer and user experience across multiple classified enclaves, leveraging a zero trust, hub-and-spoke architecture.

The Mid-Level Platform Engineer will perform hands-on platform engineering, infrastructure automation, and Tier 3 technical support activities to maintain platform availability, reliability, and performance. This role will support the deployment and sustainment of containerized workloads, infrastructure as code, CI/CD pipelines, and shared platform services while troubleshooting and resolving escalated technical issues across the enterprise. Working within a cross-functional engineering and operations team, the engineer will collaborate with senior personnel, cybersecurity staff, and Tier 2 support to deliver reliable platform capabilities to mission users.

What You Will Do Deploy, configure, maintain, and troubleshoot platform components across hybrid cloud and on-premises environments, including Kubernetes-based container platforms.

Support the operation and sustainment of containerized workloads, including application deployments, configuration management, and platform updates.

Develop and maintain infrastructure as code using Terraform, Ansible, or similar automation technologies.

Support CI/CD pipeline development and maintenance to enable secure, repeatable platform deployments.

Implement and maintain platform security configurations, including identity-aware access, network segmentation, and least-privilege controls.

Assist with onboarding new mission tenants, applications, and shared services onto the enterprise platform.

Monitor platform health, availability, and performance using logging, metrics, alerting, and dashboard technologies.

Provide Tier 3 technical support for escalated incidents involving compute, storage, networking, identity, and container infrastructure.

Troubleshoot complex technical issues across Linux operating systems, DNS, routing, load balancing, firewalls, and identity and access management.

Investigate incidents, document findings, and support root cause analysis and corrective action development.

Resolve technical issues within established service levels and escalate complex problems to senior engineers and platform leadership as appropriate.

Develop and maintain technical documentation, troubleshooting procedures, and operational runbooks.

Support the implementation of corrective actions and automation improvements to reduce recurring incidents.

Collaborate with cybersecurity personnel to maintain security configurations,…