Simulation Modeling Engineer (W2 Only / No C2C)

Responsibilities

• Create, import, and maintain high-fidelity 3D models of robotic workcells, converting CAD designs into simulation-ready assets.
• Tune simulation assets to balance detail vs execution speed of simulation.
• Convert OBJ collision meshes to VTK tetrahedral format to improve physics contact accuracy for robotic manipulation.
• Build a model validation script that checks inertia values, texture transparency, and mesh integrity at build time.
• Task Breakdown 3D Asset Pipeline: Convert SolidWorks/CAD assemblies into simulation-ready formats (SDF, URDF, glTF, VTK) with accurate kinematics, collision geometry, inertia properties, and visual materials (PBR).
• Station Configuration: Build and maintain robotic workcell configurations including robot arms, rails, sensors, end-effectors, pods, conveyors, and environmental structures.
• Collision Modeling: Create and optimize collision meshes using tetrahedral meshing workflows (RoLoPoly, TetGen, Drake mesh refiner) for accurate physics contact simulation.
• Sensor Setup: Configure simulated cameras, depth sensors, and other perception hardware with accurate field-of-view parameters.
• Validation: Build model integrity tests, verify FK/IK accuracy against real hardware, and maintain asset quality standards (mass, inertia, texture transparency, mesh integrity).
• Customer Delivery: Independently manage asset import/update requests from robotics program teams, meeting SLA timelines for new station deliveries.

Requirements

• Experience with USD (Universal Scene Description) model format.
• Familiarity with PBR materials, glTF format, and real-time rendering pipelines.
• C++ experience (our simulator core is C++).
• Web 3D visualization (Three.js, WebGL).
• Understanding of simulation contact models and deformable body simulation.
• Experience converting CAD (SolidWorks, STEP, IGES) to simulation-ready assets.
• Familiarity with camera simulation (intrinsics, distortion models, synthetic data generation).
• Years Of Experience: 5+ years professional SW development experience.
• 1+ year working with 3D modeling tools (Blender, SolidWorks, Maya, or equivalent).
• Experience with robotics simulation formats: URDF, SDF, MJCF, or similar.
• Familiarity with mesh processing: decimation, convex decomposition, tetrahedral meshing, collision geometry generation.
• Understanding of rigid body kinematics (joint types, coordinate frames, forward/inverse kinematics).
• Proficiency in Python for scripting asset pipelines and automation.
• 1+ year cumulative experience with at least one of: game engines (Unreal, Unity), physics engines (Drake, MuJoCo, Bullet, PhysX), or robotics simulation platforms (Gazebo, Isaac Sim).
• Demonstrated ability to independently own and deliver technical work with minimal oversight.

Qualifications

• Experience with physics engines (Drake, MuJoCo, Bullet, PhysX).
• Experience with robotics simulation platforms (Gazebo, Isaac Sim).
• Experience with game engines (Unreal, Unity).
• Experience with mesh processing: decimation, convex decomposition, tetrahedral meshing, collision geometry generation.
• Experience with rigid body kinematics (joint types, coordinate frames, forward/inverse kinematics).
• Experience with PBR materials, glTF format, and real-time rendering pipelines.
• Experience with camera simulation (intrinsics, distortion models, synthetic data generation).
• Experience with USD (Universal Scene Description) model format.
• Experience with CAD (SolidWorks, STEP, IGES).
• Experience with 3D modeling tools (Blender, SolidWorks, Maya, or equivalent).
• Experience with robotics simulation formats: URDF, SDF, MJCF, or similar.
• Experience with Python for scripting asset pipelines and automation.

Skills

• Experience with USD (Universal Scene Description) model format.
• Familiarity with PBR materials, glTF format, and real-time rendering pipelines.
• C++ experience (our simulator core is C++).
• Web 3D visualization (Three.js, WebGL).
• Understanding of simulation contact models and deformable body simulation.
• Experience converting CAD (SolidWorks, STEP, IGES) to simulation-ready assets.
• Familiarity with camera simulation (intrinsics, distortion models, synthetic data generation).
• Experience with physics engines (Drake, MuJoCo, Bullet, PhysX).
• Experience with robotics simulation platforms (Gazebo, Isaac Sim).
• Experience with game engines (Unreal, Unity).
• Experience with mesh processing: decimation, convex decomposition, tetrahedral meshing, collision geometry generation.
• Experience with rigid body kinematics (joint types, coordinate frames, forward/inverse kinematics).
• Experience with Python for scripting asset pipelines and automation.

Benefits

• Medical, dental & vision coverage.
• Critical Illness, Accident, and Hospital coverage.
• Life Insurance (Voluntary Life & AD&D for the employee and dependents).
• Short and long-term disability coverage.
• Health Spending Account (HSA).
• Transportation benefits.
• Employee Assistance Program.
• Time Off/Leave (PTO, Vacation or Sick Leave).

Pay And Benefits

The pay range for this position is $90.00 - $100.00/hr.

About TEKsystems

TEKsystems is an Allegis Group company. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems Global Services

TEKsystems Global Services is a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance

Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI)

We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.