Simulation Modeling Engineer

Description
We are seeking a Simulation Modeling Engineer to build high-fidelity, physics-based simulation environments for robotic systems. In this role, you will create digital representations of robotic workcells that allow engineering teams to test motion planning, controls, and system behavior before physical hardware is deployed.
You will operate as an independent contributor, owning simulation asset development end-to-end while collaborating with mechanical, controls, and simulation engineering teams.
Contract Details

• Minimum 9-month contract engagement
• Potential for full-time conversion based on performance (not guaranteed)

Key Responsibilities

• Develop and manage 3D asset pipelines, converting CAD designs into simulation-ready formats (URDF, SDF, MJCF, glTF, VTK)
• Import and configure robotic systems including robot arms, rails, conveyors, sensors, and end-effectors
• Create and optimize collision meshes using advanced techniques such as tetrahedral meshing
• Tune simulation assets to balance physical accuracy with performance efficiency
• Configure simulated sensors (cameras, depth sensors) with accurate parameters and field-of-view
• Validate models through scripting and automated checks (inertia, mesh integrity, textures)
• Verify kinematics (forward and inverse) against expected physical behavior
• Deliver high-quality simulation assets aligned with project timelines and requirements
• Drive best practices and consistency across modeling and simulation workflows

Day-to-Day Work

• Import new robotic station designs from CAD tools into simulation environments with accurate geometry and kinematics
• Convert and refine mesh assets for improved physics interactions and performance
• Build validation scripts to ensure model quality and physical correctness
• Support updates and enhancements to existing simulation environments

Required Qualifications

• 5+ years of professional software development experience
• 1+ year of experience using 3D modeling tools (Blender, Solid Works, Maya, or similar)
• Experience with robotics simulation formats such as URDF, SDF, or MJCF
• Familiarity with mesh processing techniques including decimation, convex decomposition, tetrahedral meshing, and collision modeling
• Strong understanding of rigid body kinematics, including joint types, coordinate frames, and forward/inverse kinematics
• Proficiency in Python for scripting, automation, and pipeline development
• Experience with at least one of the following:
  • Game engines (Unreal, Unity)
  • Physics engines (Drake, Mu Jo Co , Bullet, PhysX)
  • Robotics simulation platforms (Gazebo, Isaac Sim)
• Ability to independently own and deliver technical work with minimal oversight

Preferred Qualifications

• Experience with USD (Universal Scene Description)
• Familiarity with P  materials, glTF workflows, and real-time rendering pipelines
• C++ experience, especially in simulation or performance-critical systems
• Experience with web-based 3D visualization tools (Three.js, WebGL)
• Understanding of simulation contact models and deformable body simulation
• Experience converting CAD formats (STEP, IGES) into simulation-ready assets
• Knowledge of camera modeling, including intrinsics, distortion, and synthetic data generation

What Success Looks Like

• Accurate, high-quality simulation assets delivered on time
• Strong collaboration across engineering teams to translate hardware into digital models
• Continuous improvement in simulation quality, performance, and development workflows

Job Type & Location
This is a Contract position based out of Boston, MA.
Pay and Benefits
The pay range for this position is $90.00 - $100.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
Medical, dental & vision
Critical Illness, Accident, and Hospital
401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
Life Insurance (Voluntary Life & AD&D for the employee and dependents)
Short and long-term disability
Health Spending Account (HSA)
Transportation benefits
Employee Assistance Program
Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a fully onsite position in Boston,MA.
Final date to receive applications
This position is anticipated to close on Jul 17, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change.

That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color,…