--- title: 'Staff Modeling and Simulation Lead at Onebrief' canonical: 'https://feeny.ai/job/staff-modeling-and-simulation-lead-onebrief-united-states-znxs35g8w2h7' type: 'job' last_seen: '2026-09-11' --- # Staff Modeling and Simulation Lead at Onebrief - **Company:** Onebrief - **Location:** United States - **Compensation:** $134k–$180k - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-08-26 - **Last confirmed live:** 2026-09-11 - **Apply:** https://jobs.ashbyhq.com/onebrief/4a3713c2-1c90-42ed-8a08-b79d9907c1ce ## Job description Consequential Work. Dedicated People. ## About Onebrief Onebrief builds collaboration and AI-powered workflow software for military planning and operational coordination. Military planning is complex by nature, requiring teams to coordinate information, people, and decisions across systems and locations. Onebrief brings planning, collaboration, simulation, and AI into one connected environment, helping teams test strategies, adapt to changing conditions, and make decisions with greater clarity when the stakes are real. 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. ## The role Military planners need to understand what a simulation can tell them, where its assumptions hold, and where they do not. At Onebrief, you will own the models and data that make those answers defensible in AtomEngine, our cloud-based simulation engine for military planning. You will lead the technical standards and production workflows behind AtomEngine's entity catalog: how military platforms and capabilities are represented, which sources and formulas support their performance, and how that work is tested. Your judgment will shape the catalog that scenarios run on and the methods other analysts use to build it. As a Staff-level individual contributor, you will set standards and mentor other analysts. You will stay hands-on with research, modeling, and validation while directing AI agents to scale first-pass research, data entry, documentation, and testing. You will define tooling and test requirements with Engineering and partner on implementation. Production software development is not the primary focus. ## What you will own - Modeling standards. Research and select credible sources. Adopt, adapt, or develop defensible formulas for weapon and sensor effects, fuel consumption, survivability, and other performance characteristics. Document assumptions, uncertainty, and the conditions under which a model can be trusted. - Catalog priorities. Maintain a roadmap across service branches, nations, and eras. Work with Customer Relations to prioritize the catalog segments customers need most, and track coverage, freshness, and confidence so the team knows what to build or improve next. - AI-directed production. Design the instructions, review checkpoints, and quality controls that analysts and AI agents use to create entities at scale. Review their work, correct errors, and turn successful methods into repeatable workflows. Define requirements for tools that improve production. - Validation and testing. Lead verification, validation, and accreditation (VV&A) across catalog segments. Use source evidence and subject matter expert (SME) review to assess model credibility; partner with Engineering on continuous automated tests. Run competitive wargames with colleagues to expose gaps, challenge assumptions, and guide corrections. - Technical judgment with customers. Build a network of SMEs and resolve contested modeling decisions with customers and internal teams. Explain the evidence behind the numbers, make limitations clear, and use feedback to improve the catalog. - Shared working practices. Author standards and knowledge articles that others can apply consistently. Train and mentor analysts in research methods, modeling judgment, AI workflows, and VV&A so the catalog can grow without depending on one person's expertise. ## What you bring Experience applying modeling and simulation, systems engineering, operations research, or test and evaluation to complex systems. You can assess whether a model is credible for its intended use and explain why. Quantitative judgment: you can evaluate performance formulas, identify weak assumptions, and decide when to use an existing approach or develop a new one. You can make defensible calls when evidence is incomplete or conflicting. Ownership of complex technical work. You can translate competing needs into priorities, establish repeatable processes, and keep a large body of work organized, current, and traceable. Practical experience directing AI agents through research or analytical tasks, including clear instructions, review checkpoints, and error correction. You can evaluate their output against source evidence. Clear technical communication and the confidence to work through disagreements with customers and SMEs. You can turn your reasoning into standards and documentation others can follow. An investigative approach to simulation and wargaming: you actively look for where a model breaks and use what you learn to improve it. Additional experience we value AFSIM or other military simulation environments, simulation authoring, or game modding. Military doctrine, force structure, or platform performance. Test automation, QA tooling, version control, or issue tracking. Mentoring or establishing technical standards across a team. What success looks like Customer priorities translate into a clear catalog roadmap. Entities have traceable sources, documented assumptions, and evidence of validation. Analysts and AI agents follow repeatable production and review methods. Tests and wargames surface weaknesses that lead to corrections. Customers can understand both the basis and the limits of the models they use. 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. ## About Onebrief ## Company Overview - **One-liner**: Onebrief provides an AI-powered, collaborative operating system for military command, planning, and decision-making. - **Entity Type**: Private (Series D) - **Headquarters**: Honolulu, Hawaii, USA - **Founded**: 2019 - **Founders**: Grant Demaree (CEO) ## Core Business - **Primary Industry**: Defense technology / Military software - **Target Customers**: B2G (Business to Government) – specifically the U.S. Department of Defense, including the Army, Navy, Air Force, Marine Corps, Space Force, and Special Operations Forces. Also serves NATO and allied partners. - **Mission Statement**: To enable a "superhuman command" that makes brilliant decisions, scales output, and is optimally efficient, transforming how military commands operate and make decisions. ## Products & Services - **Onebrief Platform**: An AI-enabled, web-based operating system for modern military command. It fuses agentic workflows, decision intelligence, and collaborative tools into a unified, resilient platform. It is live on all major military networks (NIPR, SIPR, JWICS) and integrates with existing partner systems. Key capabilities include: - **Agentic Workflows**: AI-enabled capabilities to automate routine tasks and accelerate planning. - **Live, Synchronized Data**: Real-time data syncing across all products and users. - **Holistic Integrations**: Seamless interoperability with existing military systems and partner networks. - **Resilient Foundations**: Engineered to stay live, performant, and secure in all conditions, including wartime reality. ## Market Standing - **Valuation**: $2.15 billion (as of Series D in early 2026) [cbinsights.com](https://www.cbinsights.com/company/onebrief) - **Total Funding**: $162.89M (including a $200M Series D round) [cbinsights.com](https://www.cbinsights.com/company/onebrief) - **Key Metric**: Total funding of $162.89M. The company is integral to three of the four largest operational plans (OPLANs) globally. [onebrief.com](https://www.onebrief.com/) - **Notable Investors**: Battery Ventures, General Catalyst, Insight Partners, Salesforce Ventures, Sapphire Ventures, and 14+ others. [cbinsights.com](https://www.cbinsights.com/company/onebrief) - **Growth Signals**: Raised a $200M Series D at a $2.15B valuation in early 2026. Acquired Battle Road Digital. Named one of Fast Company's Most Innovative Companies for 2026. Reports a 70% reduction in planning cycle time and a 50% increase in information accuracy for users. [onebrief.com](https://www.onebrief.com/) ## Competitive Advantages - **Deep Domain Expertise**: Built by a team with extensive military experience (45% of employees are veterans from the Joint Staff, Service Components, NATO, and Special Operations). This gives them unparalleled insight into the specific pain points of military planning. [onebrief.com](https://www.onebrief.com/careers) - **Mission-Critical Integration**: The only performant software solution specifically designed for this use case that is live and integrated on all major classified and unclassified networks (NIPR, SIPR, JWICS). [onebrief.com](https://www.onebrief.com/) - **Proven Impact**: Documented results include a 70% reduction in planning cycle time, a 50% increase in information accuracy, and elimination of ~20 hours of weekly redundant work per user. [onebrief.com](https://www.onebrief.com/) - **High-Level Endorsement**: Integral to three of the four largest operational plans (OPLANs) globally and endorsed by top military leaders. [onebrief.com](https://www.onebrief.com/) ## Strategic Focus - **Scaling the Platform**: Rapidly scaling the organization and its platform to serve more commands and allied partners. - **AI-Enabled Command**: Deepening AI and agentic workflow capabilities to further automate and accelerate military planning and decision-making. - **Expanding Reach**: Growing its footprint across the DoD and allied nations, as evidenced by the acquisition of Battle Road Digital and partnerships like the one with Second Front Systems for rapid deployment. [cbinsights.com](https://www.cbinsights.com/company/onebrief) ## Why Work Here - **Mission-Driven Impact**: Employees directly contribute to solutions that support national security and the effectiveness of military operations. The work is described as "solving problems that matter" with a tangible impact on mission-critical operations. [onebrief.com](https://www.onebrief.com/careers) - **High Ownership & Autonomy**: The company empowers employees with a high degree of ownership and autonomy, allowing them to lead projects and shape the platform's future. [onebrief.com](https://www.onebrief.com/careers) - **Rapid Growth & Career Development**: As a rapidly scaling company, employees have a unique opportunity to influence the company's direction and unlock significant career advancement. [onebrief.com](https://www.onebrief.com/careers) - **Elite Team Composition**: The team includes veterans from elite military units (Joint Staff, Delta Force, 75th Ranger Regiment) and technologists from top tech companies (Palantir, Google, Amazon, Microsoft). This creates a unique, high-performance culture. [onebrief.com](https://www.onebrief.com/careers) - **Veteran-Friendly Culture**: 45% of employees are veterans, and the company is explicitly designed to be a mission-driven environment that aligns with the values of service, dedication, and teamwork. [onebrief.com](https://www.onebrief.com/careers) - **Work Policy**: Not explicitly stated, but the platform is built for distributed collaboration, suggesting a flexible or remote-friendly environment is likely. ## Sources 1. [onebrief.com](https://www.onebrief.com/) 2. [onebrief.com/careers](https://www.onebrief.com/careers) 3. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/onebrief) 4. [onebrief.com/about](https://www.onebrief.com/about) 5. [cbinsights.com](https://www.cbinsights.com/company/onebrief) ## Other roles at Onebrief - [Procurement Specialist](https://feeny.ai/job/procurement-specialist-onebrief-united-states-h4qx8v2zx84v) — United States - [Operations Manager, U.S. Customs and Border Protection](https://feeny.ai/job/operations-manager-u-s-customs-and-border-protection-onebrief-washington-qfpmwa91nw6j) — Washington, DC - [Customer Success Engineer [Ft. 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