Customer Success Engineer, Battle Road [USA Hybrid]

Consequential Work. Dedicated People. About Onebrief Onebrief builds collaboration and AI-powered workflow software for military planning and operational coordination. Today, many critical planning workflows still rely on fragmented systems, static documents, and disconnected tools that make collaboration and decision-making unnecessarily difficult. Onebrief brings modern software, AI, and real-time collaboration into those environments, helping teams operate with greater clarity, coordination, and adaptability in situations where decisions carry real-world consequences. We are a distributed team of builders from military, operational, and technology backgrounds who care deeply about improving how important work gets done. Some team members work remotely, while others work directly alongside customers in operational environments around the world. Founded in 2019, Onebrief is backed by leading investors including General Catalyst, Battery Ventures, Insight Partners, Sapphire Ventures, and Human Capital. Valued at more than $2 billion, we continue to invest in product innovation, AI capabilities, and team growth. Why This Role Exists As a Customer Success Engineer at Battle Road by Onebrief, you operate at the intersection of engineering and mission execution. You'll deploy AtomEngine into real-world military training environments, including Secret and air-gapped systems, where you'll configure, extend, troubleshoot, and improve the platform while working directly with customers. You may be supporting live exercises, adapting simulations, or ensuring the software performs under pressure. You are the last mile between Battle Road's simulation technology and the warfighter. What You'll Do Core responsibilities: Deploy AtomEngine into live military training environments, including classified and air-gapped systems. Work directly at various customer sites in person embedded with customers to understand their needs, iterate alongside them, and ensure successful deployments. Configure and extend entities, features, behaviors, sensors, and operational scenarios through AtomEngine tooling and scripting to reflect real-world requirements. Support integration and connectivity between AtomEngine and partner systems, including troubleshooting APIs, networking, and infrastructure dependencies. Troubleshoot technical issues in real time during high-visibility exercises, sometimes in front of large audiences, and implement technical fixes to ensure the software functions optimally for upcoming customer exercises. When not supporting active exercises, proactively identify and implement improvements from the enhancement backlog, contributing directly to the engineering backlog alongside the Software Engineering team using technologies such as Godot, C++, C#, and Python. Explain technical concepts clearly to military stakeholders, partners, and internal teams, engaging constructively with key stakeholders and responding to challenging questions with clarity and professionalism. Translate real-world friction into actionable feedback for Product and Engineering by articulating not just what is needed, but the military context and operational priority behind each request so engineering teams can prioritize effectively. Improve documentation and repeatability so deployments scale over time. Travel at least 50% of the time to customer sites Minimum Qualifications 3+ years of experience in software engineering, solutions engineering, technical consulting, or another customer-facing engineering role involving hands-on development. Demonstrated experience writing and maintaining production-quality software, with proficiency in one or more programming languages such as C++, C#, Python, GDScript, or similar. Experience troubleshooting software systems, integrations, networking, or distributed applications, with strong communication skills and the ability to explain technical concepts to both technical and non-technical audiences. Comfortable working independently in fast-paced, ambiguous environments while collaborating closely with customers and engineering teams. Active Secret or Top Secret security clearance. Prior military experience Willingness and ability to work onsite at various customer locations traveling at least 50% of the time. Preferred Qualifications Experience presenting or teaching technical concepts to large groups. Experience in modeling, simulation, game engines, or defense-related systems. Indicators of Success This role will evolve as priorities change, but the outcomes below reflect what success typically looks like in the first six months. A successful Customer Success Engineer will: Be a technical expert on Onebrief and Atom Engine Technologies, demonstrating initiative and the ability to work independently. Have Developed deep relationships with Customers Explain technical concepts clearly to military stakeholders, partners, and internal teams when supporting deployments, troubleshooting, and exercise execution. Notice to Third Party Recruitment Agencies Please note that Onebrief does not accept unsolicited resumes from recruiters or employment agencies. In the absence of an executed Recruitment Services Agreement, there will be no obligation to any referral compensation or recruiter fee. In the event a recruiter or agency submits a resume or candidate without an agreement Onebrief explicitly reserves the right to pursue and hire those candidate(s) without any financial obligation to the recruiter or agency. Any unsolicited resumes, including those submitted to hiring managers, shall be deemed the property of Onebrief.