Forward Deployed Site Reliability Engineer (TS/SCI Required)

Twenty • Arlington, VA

5d • Onsite

About The Position

At Twenty, we're taking on one of the most critical challenges of our time: defending democracies in the digital age. We develop revolutionary technologies that operate at the intersection of the cyber and electromagnetic domains, where the speed of operations exceeds human sensing and complexity transcends conventional boundaries. Our team doesn't just solve problems – we deliver game-changing outcomes that directly impact national security. We're pragmatic optimists who understand that while our mission of protecting America and its allies is challenging, success is possible.

You'll be our eyes, ears, and hands on the ground at a government customer site, ensuring the reliability and performance of Twenty's mission-critical platform running in a restricted, air-gapped AWS environment. This role sits at the intersection of deep technical ownership and customer-facing engineering: you'll define how we measure reliability, lead incident response in a constrained environment, and serve as the primary technical link between what's happening on-site and the engineering team back in Arlington. You'll work closely with the DevSecOps engineer to ensure the platform operates within government security and compliance requirements, and with product engineers to translate operational reality into actionable feedback. You'll report directly to the VP of Engineering. If you thrive operating with autonomy in high-stakes environments and find satisfaction in making complex systems provably reliable, this role is for you.

Requirements

• 5+ years of professional experience in site reliability engineering, production operations, or a closely related infrastructure role.
• Proven experience defining and tracking SLIs, SLOs, and error budgets in a production environment.
• Hands-on experience with Docker, Docker Compose, and AWS (EC2, ECS, RDS, VPCs, security groups) in production deployments.
• Solid Linux/Unix systems administration skills; productive in constrained environments where GUI tooling may be limited or unavailable.
• Experience with Terraform for infrastructure provisioning and configuration, working within DSO-provided policy guardrails.
• Experience with the LGTM observability stack or equivalent (Grafana, Loki, Prometheus/Mimir, distributed tracing).
• Strong incident response experience: you've led responses, written post-mortems and runbooks, and shipped the preventive fix.
• Scripting proficiency in Python or Bash for operational automation, with familiarity in Go a plus; experience with PagerDuty or equivalent on-call tooling.
• Experience working in or directly supporting government or defense environments, including air-gapped or enclave deployments.
• Must possess and be able to maintain a TS/SCI security clearance with appropriate polygraph
• U.S. citizenship required
• Willingness to travel occasionally for customer engagements and operational support

Nice To Haves

• Experience with NATS or similar pub/sub messaging systems in production.
• Background in cyber operations, intelligence systems, or signals environments.
• AWS certifications (Solutions Architect, SysOps, or DevOps Engineer).

Responsibilities

• Define, track, and report on SLIs and SLOs for platform services running in the customer environment.
• Use error budgets to drive reliability conversations with the Arlington engineering team, translating operational data into prioritized engineering work.
• Identify and eliminate toil: build automation for repetitive operational tasks within the constraints of the secure environment.
• Conduct post-incident reviews, own root cause analysis, and drive durable fixes in partnership with the engineering team.
• Own the observability posture for the on-site deployment — dashboards, alerting thresholds, and log pipelines using the LGTM stack (Grafana, Loki, Tempo, Mimir).
• Lead incident response on-site: triage, containment, coordination with Arlington, and customer communication.
• Maintain and continuously improve runbooks for operational procedures and emergency response protocols.
• Serve as the on-call anchor for the customer environment, with clear escalation paths to the engineering team.
• Work with the customer deployment team to get Twenty's platform stood up and updated within the restricted environment.
• Manage containerized services (Docker, Docker Compose) across deployment lifecycle — configuration, updates, rollbacks.
• Apply and validate Terraform-based infrastructure changes within the enclave, in coordination with the DSO engineer who owns IaC policy and guardrails.
• Perform capacity planning and flag scaling requirements to the Arlington team before they become incidents.
• Serve as the primary technical interface between the government customer and Twenty's engineering team — translating operational requirements, constraints, and issues in both directions.
• Represent the operational environment accurately in engineering discussions: what the team in Arlington can't see, you make visible.
• Partner with the DevSecOps engineer on compliance, logging, and audit requirements specific to the customer environment.
• Provide technical guidance and support to customer stakeholders on system behavior and troubleshooting procedures.

Benefits

• Twenty is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, veteran status, disability, or any other protected status.
• If you need a reasonable accommodation during the hiring process, let us know and we will work with you.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed