Network Security Engineer

Senior Network Security Engineer, Operational TechnologyCoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025.CoreWeave's Network Security team ensures network infrastructure is secure, resilient and compliant. Our team partners with engineering, product teams, and partners to build secure network solutions that protect critical infrastructure and continuously improve the security posture to meet the needs of our customers. With our growing reliance on connected technology, the need to keep critical systems secure, reliable, and resilient has never been more important. We are seeking an OT Security Engineer to join our team and play a pivotal role in safeguarding the operational technologies that support our datacenter networks.This position offers a unique opportunity to work at the crossroads of cyber security, operational technology (OT), engineering, and datacenter operations. As the network security engineer responsible for our operational technology networks, your responsibilities will include identifying and evaluating cybersecurity risks, designing and launching pragmatic security solutions, and embedding security controls directly into the operational systems and technologies supporting our infrastructure. You will work with suppliers and third parties in benchmarking their capabilities against expectations and industry standards. You will also lead efforts in partnering with peer security teams and partners in production engineering as you lead continuous improvement of security posture for operational technology network environments and the devices connected. This role requires both depth in understanding network security, and breadth of knowledge of the unique challenges that face the industry in securing the infrastructure that is the foundation of modern datacenters.You will act as a trusted partner who goes beyond advisory work to roll up your sleeves and deliver.Some things you will work on:Establishing standards for security expectations covering all operational technology networks and devices connected to them. This will include network segmentation, host isolation, network traversal controls, and remote connectivity.Providing solutions to complex security issues, manage multiple tasks, and prioritize effectively in a fast-paced environment.Creating an inventory and risk register that can be used as a baseline in understanding near term and long term objectives.Partnering with production engineering and business development teams evaluating priorities for risk reduction in current deployments, and risk avoidance by evolving standards for future growth.Executing and partnering with other parties in using penetration testing to evaluate effectiveness of existing controls.Coordinating with third parties and internal teams in addressing vulnerabilities via mitigation, isolation or other strategies to protect critical infrastructure in these environments.Researching industry risks and drive change in operational networks to continuously reduce riskDeveloping and test recovery models and response playbooks to handle compromise scenarios.Presenting technical security information to both technical and non-technical audiences, including external partners. Maintain technical documentation, reports, and security tooling with attention to detail.Who you are:5+ years of experience in network infrastructure security (firewalls, ACLs, architecture, risk management) in a global network environment.Proficiency in at least one programming or scripting language (e.g., Go, Python, C/C++) for automation, code reviews, and tooling.Bachelor's degree in Computer Science or related field. Relevant certifications such as CISSP, CCNP, PCNSE are advantageous.Experience with operational technology networks (factory or industrial systems, building management systems, power, physical security systems, remote access, HVAC, etc.), factory networks or other similar environments.Strong technical knowledge of network firewalls, virtual private networks, network segmentation, and defense in depth.Able to navigate ambiguity, identify root causes, and solve complex security problems.Excellent written and verbal communication skills with strong technical documentation abilities.Capable of working independently while managing multiple priorities in a fast-paced environment.Strong desire to continuously learn and adopt new technologies and security techniques.Preferred:Prior experience with operational technology networks that span global locationsExperience with the range of obscure solutions that are often deployed on operational technology networks.Deep understanding of business-wide security best practices and implementation strategies.Experience with network automation, agentic network tooling, and incident response automation.Wondering if you're a good fit? We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams – even if you aren't a 100% skill or experience match. Here are a few qualities we've found compatible with our team. If some of this describes you, we'd love to talk.You love to solve problems that few others would tackle.You're curious about critical network infrastructure that is the foundation of modern data centers.You're an expert in network security with a passion to explore the more exotic nature of operational technology.Why CoreWeave?At CoreWeave, we work hard, have fun, and move fast! We're in an exciting stage of hyper-growth that you will not want to miss out on. We're not afraid of a little chaos, and we're constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values:Be Curious at Your CoreAct Like an OwnerEmpower EmployeesDeliver Best-in-Class Client ExperiencesAchieve More TogetherWe support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and enables the development of innovative solutions to complex problems. As we get set for takeoff, the organization's growth opportunities are constantly expanding. You will be surrounded by some of the best talent in the industry, who will want to learn from you, too. Come join us!The base salary range for this role is $164,000 to $242,000. The starting salary will be determined based on job-related knowledge, skills, experience, and market location. We strive for both market alignment and internal equity when determining compensation. In addition to base salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).The range we've posted represents the typical compensation range for this role. To determine actual compensation, we review the market rate for each candidate which can include a variety of factors. These include qualifications, experience, interview performance, and location.In addition to a competitive salary, we offer a variety of benefits to support your needs. The benefits below reflect our US-based offerings for full-time employees; for roles in other locations, benefits vary and are shared during the hiring process. These include:Medical, dental, and vision insurance - 100% paid for by CoreWeaveCompany-paid Life InsuranceVoluntary supplemental life insuranceShort and long-term disability insuranceFlexible Spending AccountHealth Savings AccountTuition ReimbursementAbility to Participate in Employee Stock Purchase Program (ESPP)Mental Wellness Benefits through Spring HealthFamily-Forming support provided by CarrotPaid Parental LeaveFlexible, full-service childcare support with Kinside401(k) with a generous employer matchFlexible PTOCatered lunch each day in our office and data center locationsA casual work environmentA work culture focused on innovative disruptionCalifornia Consumer Privacy ActEqual Opportunity & AccommodationsCoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.