Cyber Security Engineer / Information Systems Security Engineer (ISSE)

Who We Are We exist to unlock human potential. Too often, AI drains it—drains budgets, drains energy resources, drains ownership of data. OpenTeams was founded to change that. We build AI that empowers. Our models are energy-efficient, cost-effective, and fully yours. Our ethos is open source. That means freedom, trust, and accountability are built into every line of code. We reinvest 3% of our profits back into the open-source community, because we believe tech is most powerful when it serves everyone. At our core, we value freedom, teamwork, accountability, and uncompromising quality. If you want to challenge the status quo, and shape tools that set people free, OpenTeams is the place to do it. Location: Remote (US) with travel to customer sites as required (Washington Metro Area preferred) Employment Type: Full-time Clearance: Active TS/SCI required Role Summary The Cyber Security Engineer / ISSE owns the security architecture and accreditation posture of the depot. This role leads RMF activities, embeds security controls into engineering workflows, and serves as the primary security interface with government assessors and authorizing officials. Responsibilities Lead RMF activities: control selection, implementation evidence, POA&M management, and ATO support Design and implement supply chain security controls: SBOM generation, artifact signing, vulnerability scanning, and provenance attestation Perform threat modeling and security reviews of depot architecture and workflows Integrate security tooling into CI/CD pipelines and enforce policy gates Support cross-domain and classified environment requirements, including secure transfer procedures Interface with government ISSMs, assessors, and authorizing officials Required Qualifications Active TS/SCI clearance Experience with Xacta, eMASS, or CSAM 6+ years in cyber security or ISSE roles supporting DoD or IC systems Hands-on experience with RMF, NIST 800-53, and eMASS or equivalent Experience with DevSecOps tooling: container scanning, SAST/DAST, signing, and policy enforcement IAT/IAM Level II or III certification per DoD 8140 (for example Security+, CISSP, or CISM) Preferred Qualifications Experience securing AI/ML systems or software supply chains at scale Familiarity with cATO approaches and continuous monitoring Experience with IL5/IL6 or cross-domain solutions Grow With Us At OpenTeams, growth isn’t just about the company—it’s about you. We believe the best careers are built at the edge of your potential. That is where new tools, ideas, and technologies change the world. Here, you’ll work alongside pioneers of AI, solving problems that matter: making AI more transparent, more ethical, and more empowering. As your skills grow, our career framework provides a pathway and recognition of that increased impact. Opportunities aren’t limited by geography. You’ll collaborate with global experts, contribute to open source projects that power the world’s technology, and stretch your skills daily. That global perspective and diversity makes our solution more universal and robust. We are committed to continuing to celebrate diversity on our team. Supported people are successful people. We offer 100% employer paid medical premiums for employees and self-managed PTO with a minimum time off requirement, so that our teams are able to do their best work. We invest in curiosity, creativity, and ownership. That means you’ll be trusted to boldly innovate, supported to learn fast, and celebrated for successful collaboration. Commitment to diversity, equity, inclusion, and belonging OpenTeams understands that valuing diverse creative practices and forms of knowledge is crucial to and enriches the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, disabled people, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer - all qualified applicants will receive equal consideration for recruitment, interviews, employment, training, compensation, promotion, and related activities. We do not discriminate based on race, religion, gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. OpenTeams will not tolerate discrimination or harassment based on these characteristics or any other unlawful behavior, conduct, or purpose.