{"id":4315070,"url":"https://alion.io/job/gram-simulation-and-digital-twin-lead","title":"Simulation and Digital Twin Lead","company":{"id":673569,"name":"GRAM","domain":"gram.ai","url":"https://alion.io/company/gram-3","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-14T05:58:10Z"}},"role":"Robotics","role_family":"Robotics","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Digital Twin","optional":false},{"name":"Gazebo","optional":false},{"name":"Isaac Sim","optional":false},{"name":"Motion Planning","optional":false},{"name":"MuJoCo","optional":false},{"name":"NVIDIA PhysX","optional":false},{"name":"Python","optional":false},{"name":"Sim-to-Real","optional":false},{"name":"Isaac Lab","optional":true}],"status":"live","first_seen_at":"2026-11-14T14:10:15Z","employer_posted_date":"2026-11-14","last_verified_at":"2026-11-14T15:23:53Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Simulation and Digital Twin Lead\nGRAM, San Francisco Bay Area\nAbout the company\nGRAM Corporation scales skilled labor for the physical economy. We design, manufacture and operate insectoids, general-purpose machines not built in our image. They work in large populations on the critical infrastructure nations depend on. The electric grid comes first. Our research is in how those populations coordinate and keep themselves running. The goal is Self-Replication (SR), the point where a population of machines delivers more labor than it takes to build and run.\nThe role\nYou will own the simulation stack and tooling used by the whole engineering team, and build a high-fidelity digital twin of the robot that is validated against real hardware. The Controls, Autonomy and Systems Integration teams will rely on it to develop and test before anything runs on the robot. This is a hands-on role: you will choose the tools, build the models yourself and prove that simulation matches the machine. You start as an individual contributor, with a path to build and lead a team as the company grows.\nWhat you will do\nOwn the simulation stack and tooling used by the whole engineering team, including the choice of physics engine.\nBuild the digital twin of the robot, from actuators and joints to full body contact, and validate it against hardware data.\nOwn sim to real: system identification and comparison of field logs against simulation.\nBuild environment simulation of the sites the robot will work in, such as towers and substations, from survey data.\nSimulate sensors such as cameras, depth and IMU to support perception and motion planning.\nMake the simulation run at scale, with many robots in parallel, for policy training and regression testing.\nWhat you bring\nDeep hands on experience with physics simulation of articulated robots, using a robot simulator such as Isaac Sim or Gazebo, or a physics engine such as MuJoCo or PhysX, including how the contact model works.\nYou have closed the sim to real loop on real hardware, making simulation match a physical machine through system identification and validation against logged data.\nExperience modeling actuators, transmissions and joints in simulation.\nStrong Python and working C++.\n5+ years of experience. Depth in physics simulation and sim-to-real on real hardware matters more than years.\nNice to have\nExperience with legged robots or robots on outdoor terrain.\n3D reconstruction of real sites from photogrammetry or similar survey data.\nLarge scale parallel simulation for policy training, such as Isaac Lab or MJX.\nAutonomous vehicle simulation backgrounds are welcome if you can demonstrate work with actuators and joints.\nWhy join\nA clean slate: define the simulation stack the whole engineering team builds on.\nEarly equity, included in the package.\nThe chance to own a domain and build a team around it as the company scales.\nA hands on culture where engineers work directly on the core technology.","description_format":"text","description_chars":2965,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Industrial IoT (IIoT)","Robotics AI","Robotic Software & Control Systems"],"lifecycle":[{"event":"open","at":"2026-11-14T15:23:53Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":29,"reasons":["conf:1","win:early"],"computed_at":"2026-11-14T17:14:36Z"},"pay":null,"html_url":"https://alion.io/job/gram-simulation-and-digital-twin-lead","json_url":"https://alion.io/job/gram-simulation-and-digital-twin-lead.json","meta":{"generated_at":"2026-11-14T17:14:36Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":19845,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-15T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":673569},"rest":"https://alion.io/mcp/rest/get_company?id=673569"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgram-simulation-and-digital-twin-lead"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fgram-simulation-and-digital-twin-lead"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fgram-simulation-and-digital-twin-lead"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/gram-simulation-and-digital-twin-lead\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgram-simulation-and-digital-twin-lead"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4315070}},{"tool":"search_jobs","arguments":{"company":"gram.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4315070},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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