Customer Success Engineer

Onebrief

Customer Success Engineer for military modeling and simulation technology at Onebrief. Deploying AtomEngine in live military training environments and engaging directly with customers.

Posted 5/2/2026full-time🇺🇸 United StatesMid-LevelSenior💰 $135,000 - $185,000 per yearWebsite

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Deploy AtomEngine into live military training environments, including classified and air-gapped systems
Work directly onsite with various customers, embedded with customers to learn their needs and iterate alongside them.
Write code to develop capability at the edge, prototyping and implementing new AtomEngine features that help customers achieve their goals via both the Mod Kit and source control branches.
Partner with the core product & engineering teams to learn the code base and drive changes back to the mainline.
Configure and adapt entities, behaviors, and operational scenarios to reflect real-world requirements
Troubleshoot technical issues in real time during high-visibility exercises, sometimes in front of large audiences
Teach technical concepts clearly to mixed technical and non-technical audiences, helping military stakeholders understand not just how the platform works, but why it works
Engage constructively with key stakeholders and respond to challenging questions with clarity and professionalism
Translate real-world friction into actionable feedback for Product and Engineering
Improve documentation and repeatability so deployments scale over time
Travel at least 50% of the time to client sites

Requirements

What you’ll need

3+ years of professional experience in a software engineering, solutions engineering, or technical customer-facing role involving hands-on development
Demonstrated experience writing and maintaining production-quality code, including extending existing frameworks, SDKs, or plugin systems
Proficiency in at least one general-purpose programming language used for application or game-adjacent development (e.g., C#, Python, C++, GDScript, or similar)
Strong systems thinking and understanding of modular, maintainable software design
Comfort working with customers face-to-face to debug, iterate, and validate solutions in real-world environments
Self-directed and effective in fast-moving, ambiguous environments
Active Secret or Top Secret security clearance
Willingness and ability to travel at least 50% of the time.

Benefits

Comp & perks

Equity: Share in the company's success.
Flexible Work Environment: Remote-first organization* with flexible work hours and unlimited PTO.***(*note that some roles are in-person, on-site with customers)
Comprehensive Health Coverage: Health, dental, vision, and life insurance.
Retirement Plan: 401(k) plan with company match to secure your future.
Parental Leave: 8 weeks at 100% regardless of state.
Company Retreats: Annual company summit trips.
Home Office Budget: $1,000 per year for home office improvements.

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

C#PythonC++GDScriptproduction-quality codemodular software designSDKsplugin systemsprototypingsource control

Soft Skills

systems thinkingcustomer engagementclear communicationproblem-solvingself-directedadaptabilityteachingfeedback translationprofessionalismcollaboration

Certifications

Active Secret security clearanceActive Top Secret security clearance