Tier 3 Platform Engineer

Peraton • Chantilly, VA

1d • Onsite

About The Position

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 and uses a zero trust, hub-and-spoke architecture. This hands-on role covers platform engineering, infrastructure automation, and Tier 3 support to maintain platform availability, reliability, and performance. The engineer will support containerized workloads, infrastructure as code, CI/CD pipelines, and shared platform services while resolving escalated issues across hybrid cloud and on-premises environments. The role is fully onsite in Chantilly, Virginia, and includes rotating shifts within a 6:00 AM–6:00 PM, seven-day coverage window, plus a shared after-hours on-call rotation.

Requirements

• Active TS/SCI clearance with Polygraph.
• Bachelor’s degree in Computer Science, Engineering, Information Systems, or a related technical field, plus at least 5 years of relevant experience; alternatively, 4 additional years of relevant experience may substitute for a degree.
• Hands-on experience operating and troubleshooting production containerized workloads using Kubernetes or a Kubernetes-based platform.
• Experience supporting at least one major cloud environment (AWS, Azure, or a government cloud region) and hybrid cloud or on-premises infrastructure.
• Working knowledge of infrastructure as code technologies, including Terraform, Ansible, or similar tools.
• Working knowledge of CI/CD pipelines and automated deployment processes.
• Demonstrated troubleshooting ability across Linux systems, networking technologies (DNS, routing, load balancing, and firewalls), and identity and access management.
• Experience supporting production systems under defined service levels, including incident and problem management.
• DoD 8140 / 8570 IAT Level II certification, such as Security+ CE, or ability to obtain the required certification within the established timeframe.
• Ability to work rotating shifts within the seven-day onsite coverage window and participate in the shared after-hours on-call rotation.

Nice To Haves

• Experience supporting enterprise platforms across multiple classification levels or security enclaves, including cross-domain data movement.
• Familiarity with zero trust architecture principles and their implementation within cloud environments.
• Experience with IT service management tools, including ServiceNow.
• Familiarity with observability tools and platforms such as Prometheus, Grafana, Splunk, or Elastic.
• Experience supporting Risk Management Framework authorization activities or continuous Authority to Operate (cATO).
• Kubernetes certifications such as CKA, CKAD, or CKS, and/or a cloud professional certification.
• Prior experience supporting Intelligence Community or Department of Defense mission programs.

Responsibilities

• Deploy, configure, maintain, and troubleshoot platform components across hybrid cloud and on-premises environments, including Kubernetes-based container platforms.
• Operate and sustain containerized workloads, including application deployments, configuration management, and platform updates.
• Develop and maintain infrastructure as code using Terraform, Ansible, or similar automation technologies.
• Support development and maintenance of CI/CD pipelines for secure, repeatable platform deployments.
• Implement and maintain platform security configurations, including identity-aware access, network segmentation, and least-privilege controls.
• Assist with onboarding 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 support for escalated incidents involving compute, storage, networking, identity, and container infrastructure.
• Troubleshoot technical issues involving Linux, 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 corrective actions and automation improvements to reduce recurring incidents.
• Collaborate with cybersecurity personnel on security configurations, continuous monitoring, and accreditation documentation.
• Provide technical guidance to Tier 2 support personnel and contribute to knowledge-sharing activities.
• Work rotating onsite shifts and participate in the shared after-hours on-call rotation.

Benefits

• Medical benefits
• Dental insurance
• Vision insurance
• Life insurance
• Health savings account
• Short- and long-term disability
• Employee Assistance Program (EAP)
• Parental leave
• 401(k)
• Paid time off (PTO) for vacation
• Company-paid holidays
• Employees may be eligible for overtime, shift differential, and a discretionary bonus, depending on the position.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level