Staff Infrastructure Security Engineer: Scale Secure AI Cloud

Crusoe is on a mission to accelerate the abundance of energy and intelligence . As the only vertically integrated AI infrastructure company built from the ground up, we own and operate each layer of the stack — from electrons to tokens — to power the world's most ambitious AI workloads. When you join Crusoe, you join a team that is building the future, faster. We're in the midst of the greatest industrial revolution of our time. The demand for AI compute is boundless, and power is a bottleneck. We're solving that — with an energy-first approach that makes AI infrastructure better for the world and faster for the people innovating with AI. We're looking for problem-solving, opportunity-finding teammates with a sense of urgency, who believe in the scale of our ambition and thrive on a path not fully paved — people who want to grow their careers alongside a team of experts across energy, manufacturing, data center construction, and cloud services. If you want to do the most meaningful work of your career, help our customers and partners advance their AI strategies, and be part of a high-performing team that believes in each other, come build with us at Crusoe. About This Role Crusoe’s mission is to accelerate the abundance of energy and intelligence. We’re seeking a Staff Infrastructure Security Engineer to secure the foundations of Crusoe Cloud, our purpose-built compute platform for AI and high-performance workloads. This role focuses on designing and embedding security controls directly into our global infrastructure, enabling customers to train advanced models within a trusted, secure-by-default environment. You’ll operate at the intersection of infrastructure, security, and reliability; architecting identity, network, and cloud security systems that scale with a high-growth cloud provider. What You’ll Be Working On Architecting security controls across compute, networking, and storage layers of a global cloud platform Championing Infrastructure-as-Code (IaC) standards (e.g., Terraform) to enforce secure defaults, immutability, and drift detection Building automated security guardrails embedded directly into CI/CD and deployment pipelines Collaborating on a centralized Vault-as-a-Platform service to manage secrets, encryption keys, and internal PKI Designing and operating certificate lifecycles (X.509, SSH) to support secure machine-to-machine trust Driving adoption of short-lived, Just-In-Time (JIT) access models to reduce standing privileges and improve auditability Securing core network foundations, including global DNS architecture, service discovery, and network authentication systems Designing and maintaining authentication controls for network infrastructure to ensure secure, monitored access Partnering closely with infrastructure, platform, and SRE teams to identify and remediate security gaps in foundational systems What You’ll Bring to the Team 8+ years of hands-on experience in infrastructure engineering, SRE, or security engineering Deep understanding of security principles across the stack, from Linux and container runtimes to cloud control planes Proven experience using Infrastructure-as-Code (Terraform) to manage complex, multi-environment infrastructure at scale Strong knowledge of cryptography, secrets management, PKI, and modern authentication standards Experience securing public cloud (AWS, GCP) and/or bare-metal environments Strong networking fundamentals, including routing, segmentation, firewalls, and Zero Trust architectures Hands-on experience with Kubernetes and container security, including secure secrets injection into microservices Fluency in at least one programming language (Go or Python preferred) for automation and tooling Bonus Points Experience building or operating internal security platforms (e.g., Vault-as-a-Service) Background securing high-scale cloud or AI infrastructure Experience implementing Zero Trust identity architectures end-to-end Familiarity with bare-metal provisioning and data center security considerations Benefits: Competitive compensation Restricted Stock Units Paid time off & paid holidays Comprehensive health, dental & vision insurance Employer contributions to HSA account Paid parental leave Paid life insurance, short-term and long-term disability Professional development & tuition reimbursement Mental health & wellness support Commuter benefits (parking & transit) Cell phone stipend 401(k) Retirement plan with company match up to 4% of salary Volunteer time off Compensation Range Compensation will be paid in the range of up to $210,000 - $265,000 + Bonus. Restricted Stock Units are included in all offers. Compensation to be determined by the applicants knowledge, education, and abilities, as well as internal equity and alignment with market data. Crusoe is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, disability, genetic information, pregnancy, citizenship, marital status, sex/gender, sexual preference/ orientation, gender identity, age, veteran status, national origin, or any other status protected by law or regulation. Job posting details for Staff Infrastructure Security Engineer (Generalist) at Crusoe Energy Systems in San Francisco, CA - US. . ClimateTechList gathers 9,000+ job openings from over 523 climate tech companies and updates them daily. #J-18808-Ljbffr Crusoe Energy Systems