Senior Platform Engineer

📋 Description

• • Senior Platform Engineer responsible for building and scaling the foundational infrastructure that powers Onebrief’s Commercial-off-the-Shelf (COTS) application across government environments at multiple classification levels, enabling fast, reliable delivery while meeting stringent Department of Defense (DoD) requirements.
• • Day-to-day responsibilities include designing, provisioning, and managing cloud and on-prem environments using Terraform and Ansible; operating secure, resilient Kubernetes clusters; improving CI/CD pipelines in GitLab CI/CD, Jenkins, and GitHub Actions; implementing monitoring, logging, and alerting with Prometheus, Grafana, ELK/Datadog; embedding RMF and STIG controls into automation; managing AWS/Azure/GCP resources and on-prem networks; triaging complex platform issues; writing clear documentation and runbooks; and mentoring teammates.
• • Onebrief is an all-remote company founded in 2019 by experienced planners, with a team spanning veterans from all military forces and technologists from leading software companies. The company has raised over $320M from top-tier investors including Battery Ventures, General Catalyst, Sapphire Ventures, Insight Partners, and Human Capital, and is valued at $2.15B. Onebrief operates as a purpose-built operational planning platform designed to accelerate military decision-making, deployed on SIPR, NIPR, and JWICS networks.
• • In this role, you will gain deep expertise in secure, compliant infrastructure for mission-critical environments; shape platform systems and guide key technical decisions; develop strong documentation and mentoring practices; and directly impact operational readiness by enabling faster, smarter, and more efficient military staff operations through reliable platform delivery.