OT Network Engineer (Physical Infrastructure)

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: SpaceXSI is looking for an exceptional network engineer with experience in mission-critical or large-scale production environments to support our supercomputer infrastructure. As a member of the Physical Infrastructure Networking team, you will provide operational and designs services for physical infrastructure networks. The ideal candidate thrives in intense, high flux environments, brings a strong sense of urgency balanced with operational excellence, communicates effectively, and demonstrates high levels of technical acumen. RESPONSIBILITIES: Design and implement highly available networks, carefully balancing various routing and redundancy technologies depending on unique requirements between production and launch. Design and maintain mission data center and site networks in accordance with company network standards. Collaborating with adjacent infrastructure and enterprise teams. Evaluate, procure, and deploy network hardware including switches, firewalls, multiplexing and SDWAN appliances. Contribute to ever maturing network automation tooling; implementing configuration analysis, linting, and scalability into the deployment framework. Plan and coordinate network outage windows with stakeholders to perform software updates, hardware refreshes, and general network maintenance (sometimes on weekends and evenings). Troubleshoot and resolve network-related issues, publishing root cause analysis (RCA) documentation and hosting retrospective data reviews. Provide direct networking support during launch and test campaigns and be on-call or provide real-time support as networking responsible engineer during operations. Proactively tailors network monitoring to provide ever more valuable operational telemetry with emphasis on issue detection prior to operational impact. Continuously create and update network documentation, including architecture overviews, design drawings, and operational procedures. Collaborate with cross-functional teams to proactively identify and resolve potential technical issues with network designs, especially in regards to systemic, cascading failure modes, and superficial redundancy. Perform job walks with customers, vendors, and contractors to gather network requirements and create implementation plans. Ensure networks are configured and maintained in compliance with industry and cybersecurity standards (e.g., ITAR, ISO, NIST), with particular attention to controls network segmentation and security. Design and validate resilient, scalable multi-site OT network topologies optimized for critical facilities. Audit, and enforce zero-trust firewalls to decouple facility infrastructure from the corporate DMZ. Author comprehensive system/network architecture drawings, IP/VLAN schemes, and data flow diagrams. Support on-site system deployment, physical network cutovers, and new site commissioning. BASIC QUALIFICATIONS: Bachelor’s degree in computer science, computer engineering, or other STEM discipline and 3+ years of professional network engineering experience; OR 5+ years of professional network engineering experience in lieu of a degree. 2+ years of hands-on experience in Operational Technology (OT) networking, critical facility infrastructure, industrial automation, or controls engineering. Extensive hands-on experience designing, deploying, supporting, and troubleshooting Layer 2 and Layer 3 networks in latency sensitive and/or industrial environments. Functional experience with multiple network vendors either in production or lab environments. Experience with GitOps and Infrastructure as Code Frameworks, both as user and contributor. PREFERRED SKILLS AND EXPERIENCE: Strong understanding of the OSI model and network standards. Hands-on experience with Cisco, Arista, and Juniper data center class switches. Experience with Wave Division Multiplexing (WDM) and fiber optics infrastructure. Extensive knowledge of common enterprise and media protocols. Experience with switch port security features, network segmentation, QoS, multicast, and redundancy protocols. Familiarity with network monitoring tools and layer 1 testing tools. Proficiency in scripting (Bash/PowerShell/Python) and automation frameworks (Terraform, Ansible, etc.). Linux and Windows system administration experience professionally or from labs. Industry standard certifications such as CCNA or CCNP. Experience supporting real-time systems, industrial control networks, or operational technology (OT) environments in aerospace, defense, energy, oil & gas, or similar high-reliability industries. Excellent communication skills with the ability to communicate with internal/external customers, vendors, and management in both formal and informal situations. ADDITIONAL REQUIREMENTS: Ability to work in tight quarters; physical dexterity is necessary to perform job functions. Availability for extended hours and/or weekends as the schedule varies depending on site operational needs; flexibility is required. Ability to provide 24x7 on-call support in emergency situations and participate in an after-hours on-call rotation. Willingness to travel (up to 20%, including flying to other sites worldwide) and potential time at sea supporting marine systems. Ability to lift 30 lbs. Ability to work at heights. Ability to drive (active valid driver’s license). SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice .