Site Reliability Engineer

xAI; Southaven, Memphis (MS, TN); On-site; USD 120,000 - 190,000; Full time

Job summary

SpaceX is seeking a Site Reliability Engineer focused on campus reliability to design, monitor, and guard the reliability of one of the world’s largest AI training campuses. You will lead technical incident responses, coordinate cross-disciplinary teams, and ensure tight observability across compute, network, storage, and facility systems.

You will drive blameless postmortems, guide fleet-scale change management, and partner with NOC and hardware teams to reduce incident sizes and improve MTTR

Qualifications

• Bachelor's degree or equivalent experience in a relevant field.
• 5+ years of site reliability, systems engineering, plant operations, or large-scale production ops.
• Proven large-scale incident command experience and calm leadership.
• Monitoring/observability design at fleet or campus scale, alert hygiene and signal quality.
• Experience with at least Prometheus/Grafana, NVIDIA DCGM, or industrial telemetry/controls.

Responsibilities

• Own monitoring architecture and signal quality across GPU and host telemetry and facility telemetry.
• Drive suppression and redesign using NOC noise-disposition feedback.
• Treat alert noise as a design failure, not an operator failure.
• Provide SEV command support and incident leadership.
• Run blameless postmortems and drive corrective actions to closure.
• Gate high-risk changes (firmware/BIOS/BMC) with disciplined change management.
• Lead cross-functional reliability projects across compute, network, storage, and facility signals.
• Partner with Hardware Failure Analysis to convert fleet data into monitoring and RCA inputs.
• Build and maintain playbooks, run game days, and maintain dependency maps.

Skills

Incident leadership

Cross-functional collaboration

Data-driven decision making

SRE best practices

Blameless postmortems

Automation with scripting

Education

Bachelor's degree in Systems Engineering, CS, or EE

Tools

Prometheus/Grafana

NVIDIA DCGM

SCADA

BMS/BAS

EPMS

DCIM

PLC/Modbus/BACnet

Job description

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars. SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next.

About the Role

As a Site Reliability Engineer focused on campus reliability, you will design what the campus watches and trusts, technically command cross-discipline SEVs, and build the guardrails that make the next incident smaller. You are the connective tissue across compute, network, storage, power, and cooling on one of the largest AI training campuses in the world. This role demands calm incident leadership, fleet-scale observability judgment, and the ability to drive reliability work across software and facility boundaries. We are looking for candidates from power plants, nuclear power plants, data centers, or people who currently work or have worked in facilities like SpaceXSI with power, compute, cooling, and related plant systems.

Responsibilities

• Own monitoring architecture and signal quality across GPU and host telemetry (DCGM, Prometheus/Grafana) and facility telemetry (BMS, EPMS, DCIM, SCADA, CDU / direct liquid cooling): what we alert on, suppress, and trust.
• Consume NOC noise-disposition feedback to drive suppression and redesign.
• Treat alert noise as a design failure, not an operator failure.
• Provide SEV command support: technical incident leadership, bridge coordination with the NOC, paging and escalation (e.g., PagerDuty), and timeline and severity hygiene.
• Run blameless postmortems and drive corrective actions to closed, not filed.
• Gate high-risk change: fleet-scale firmware/BIOS/BMC rollouts (Redfish, canaries, rollback) and SOP/MOP/EOP-governed work on power and cooling systems through a disciplined change management process.
• Lead cross-functional reliability projects spanning compute, network (InfiniBand/RoCE), storage, and facility signal boundaries, including grey failures that cross those boundaries (e.g., NVLink flapping, thermal throttling, power sequencing).
• Partner with Hardware Failure Analysis on systemic failure classes: turn fleet data (MTBF/AFR, repeat-RMA trends) into monitoring, stop-rules, and vendor RCA inputs.
• Build and maintain playbooks, run game days, and keep cross-discipline dependency maps current.
• Own runbook quality jointly with the NOC (SRE designs; NOC operates and corrects).
• Define error budgets and availability objectives at campus and service boundaries as adopted by the business.
• Participate in on-call rotations and incident response for SEV-class events in the Memphis / Southaven data center campus.

Profile Signals

• Experience in power plants, nuclear power plants, data centers, or facilities like SpaceXSI — current or prior — spanning power, compute, cooling, or related plant systems.
• Proven large-scale incident command experience and calm technical leadership on a bridge.
• Nuclear control-room, shift supervisor / Senior Reactor Operator (SRO), Shift Technical Advisor, or Navy nuclear experience counts as incident command.
• Demonstrated monitoring and observability design at fleet or campus scale, including alert hygiene, suppression, and signal quality.
• Treats alert noise as a design failure, not an operator failure.
• Cross-team facilitation and systems engineering depth across software and facility boundaries.

Success Measured By

• MTTD / MTTR trend for SEV-class events % of SEVs with a blameless postmortem and closed action items Alert actionable ratio Recurrence rate of incident classes Monitoring coverage of critical dependencies across compute, network, storage, power, and cooling GPU fleet availability lost to infrastructure events

Basic Qualifications

• Bachelor's degree in Systems Engineering, Computer Science, Electrical Engineering, or a related field (or equivalent experience).
• 5+ years of experience in site reliability, systems engineering, plant operations, or large-scale production operations, preferably in power plants, nuclear power plants, high-performance computing, or data center environments.
• Proven large-scale incident command experience and calm technical leadership on a bridge, whether from an SRE/NOC bridge or a plant control room.
• Demonstrated monitoring and observability design at fleet or campus scale, including alert hygiene, suppression, and signal quality.
• Hands-on experience with at least one of: Prometheus/Grafana, NVIDIA DCGM, or industrial telemetry and controls (SCADA, BMS/BAS, EPMS, DCIM, PLCs, Modbus/BACnet).
• Experience working across at least two of: compute, network, storage, power, and cooling / facilities telemetry.
• Experience writing and operating playbooks, runbooks, or SOP/MOP/EOPs with a 24/7 operations, control room, or NOC partner.
• Proficiency in scripting (Python, Bash) for automation and analysis, plus general experience in at least one systems language (C, C++, Java, Go, Rust, or similar).
• Not required to be expert in all of them.
• Excellent problem-solving skills with a data-driven approach to reliability engineering.
• Ability to work collaboratively with cross-functional teams, including NOC, data center operations, hardware failure analysis, and infrastructure engineering.

Preferred Skills and Experience

• Experience in power plants, nuclear power plants, or other high-consequence industrial control environments (ICS/OT).
• Current or prior work in data centers or facilities like SpaceXSI spanning po