About the Role

We are seeking a Site Reliability Engineer to join our Ground Software team. As a Site Reliability Engineer, you will design, build, and operate the ground and site network infrastructure that connects Apex facilities and mission operations across both commercial and secured environments. This is a hands-on engineering role for someone who is equally comfortable architecting a highly available Kubernetes platform, and defining the security posture that keeps it all compliant. You will be a primary technical owner, setting the standards that the rest of the team builds on.

Responsibilities:

• Architect and build ground and site network infrastructure spanning commercial and secured or classified environments through the platform layer.

• Design, deploy, and scale highly available Kubernetes clusters that support workloads across multiple security and classification levels.

• Own the security posture of ground infrastructure, defining and enforcing controls, hardening, and compliance for sensitive government and commercial programs.

• Build and maintain infrastructure as code using Terraform, Terragrunt, and similar tooling so that environments are repeatable, reviewable, and fast to stand up.

• Establish observability across the ground network, including monitoring, metrics, logging, and alerting, so issues are caught before they reach a mission.

• Design and run CI/CD pipelines and automation that streamline deployments and reduce manual, error-prone work.

• Act as a primary site reliability engineer for ground systems, driving uptime, incident response, and reliability standards on programs where downtime is not an option.

• Partner with security, mission operations, and program teams to translate requirements into infrastructure that is both compliant and operable.

• Set architectural standards and mentor other engineers, raising the bar for how ground infrastructure is built at Apex.

Requirements:

• Applicants must be U.S. persons as defined by U.S. export-control law.

• 5+ years of experience in site reliability, infrastructure, or network engineering, with a meaningful portion in aerospace, defense, satellite, or another mission-critical domain.

• Hands-on experience architecting and operating ground network or large-scale production network infrastructure.

• Deep expertise with Kubernetes and containers, including building and scaling high availability clusters in production.

• Strong networking fundamentals across routing, switching, segmentation, and secure network design.

• Proven experience with infrastructure as code with CI/CD, automation, and observability tooling such as Prometheus, Grafana, or similar.

• Working knowledge of security and compliance for regulated or classified environments, and the judgment to design a defensible security posture.

• Proficiency scripting and building tooling in Python, Go, or a comparable language.

Nice-to-Haves

• Active Top Secret or Top Secret/SCI clearance

• Prior experience supporting classified or government space programs or standing up infrastructure across multiple classification levels.

• Familiarity with GitOps workflows and tools such as ArgoCD, and with modern observability stacks including Mimir.

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What We Offer For Full-time Employees:

• Shared upside: Receive equity in Apex, letting you benefit from the work you create