Principal Mechanical Engineer - Robotics

Sigil Partners
Peachtree Corners, GA

We’re seeking Senior and Staff Mechanical Engineers to join a growing, highly hands-on robotics team developing autonomous industrial robotics platforms that are transforming automation efficiency. You’ll work on large-scale mechanical systems that move high payloads, taking ownership of designs from early concept through rapid prototyping and real-world deployment. This is an opportunity to work in a very successful growing company where your contributions directly impact product performance, customer success, and the evolution of next-generation robotic platforms already deployed with major industrial customers.


This is an onsite role in the Peach Tree Corners, GA area requiring regular collaboration with the robotics engineering teams. Qualified hires will receive strong annual Comp, Comprehensive Benefits + Equity.


Key Responsibilities

  • Design and develop mechanical systems and structures for autonomous mobile robots, including chassis, frames, and heavy-duty weldments
  • Own projects from concept through prototype, testing, and early production deployment in real-world environments
  • Design for high-load applications (~20,000 lbs), accounting for shock, vibration, durability, and repairability
  • Develop and iterate on electromechanical subsystems including motor modules, wheel assemblies, and hydraulic lift systems
  • Collaborate with electrical and software engineers to ensure seamless system integration (motors, thermal, controls)
  • Drive rapid prototyping, including hands-on building, testing, and modification of designs on the shop floor
  • Work with manufacturing and suppliers on fabrication methods such as welding, laser cutting, and forming
  • Optimize designs for cost, manufacturability (DFM/DFA), and performance in a fast-iteration environment


Key Qualifications

  • 5–15+ years of experience in mechanical design and product development (flexible for exceptional candidates at both junior and senior levels)
  • Experience required in robotics, automotive, or heavy industrial systems
  • Strong experience designing large mechanical structures such as frames, weldments, or heavy industrial components
  • Proficiency in SolidWorks for CAD design and mechanical development
  • Experience working with materials and manufacturing processes such as steel fabrication, welding, and machining
  • Demonstrated ability to take products from concept through prototype to real-world deployment
  • Hands-on experience building, testing, and iterating mechanical systems (not purely design or simulation-focused)
  • Ability to balance product optimization thru cost, performance, reliability
  • Bachelor’s or Master’s degree in Mechanical Engineering or related field


Preferred / Bonus Qualifications

  • Exposure to electromechanical systems including motors, drivetrains, or hydraulic systems
  • Startup or low-volume production experience with fast iteration cycles
  • Experience designing systems for real-world environmental constraints (shock, vibration, high loads)


Please Note: Qualified candidates must possess US Citizenship or Greencard status to be considered upon submittal.

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