Senior Mechanical Engineer

PI Physik Instrumente•Shrewsbury, MA

9d•Onsite

About The Position

We are seeking a highly motivated and experienced Senior Mechanical Engineer - Piezo to join our Engineering team in our Shrewsbury, MA office. The successful candidate will be responsible for designing, developing, and optimizing high-precision mechanical systems and motion instruments from concept through productions.

Requirements

Bachelor’s degree in Mechanical Engineering or a closely related field (Master's degree preferred)
5+ years of experience in mechanical design, product development, or mechatronic systems, with significant exposure to precision motion or high-performance mechanical systems.
Demonstrated experience designing and releasing mechanical systems from concept through production in a product development environment.
Strong proficiency with 3D CAD software (SolidWorks preferred) for complex assemblies, detailed design, and engineering documentation.

Nice To Haves

Experience with precision manufacturing processes such as CNC machining, tight-tolerance fabrication, and assembly methods.
Familiarity with design control processes, PDM systems, and engineering change workflows.
Experience working within ISO 9001 or similarly structured quality systems; familiarity with lean/5S principles.
Background in manufacturing, especially high-mix, low-volume production environments.

Responsibilities

Lead the design and development of mechanical components, subassemblies, and system architectures for high-precision motion instruments across full product development cycles.
Own mechanical design execution from concept through production release, including technical decision-making and design validation.
Develop advanced 3D CAD models, detailed engineering drawings, and complete design documentation with full adherence to precision tolerance and GD&T standards.
Perform and lead engineering analysis including tolerance stack-ups, error budgets, and FEA (thermal, structural, and modal) to ensure system-level performance and stability.
Design precision mechanisms, motion systems, and opto-mechanical assemblies, including kinematic structures, flexures, and thermally stable architectures.
Design monolithic flexures (often via wire EDM) using CAD software and using ANSYS or SolidWorks to optimize for high resonant frequencies, thermal stability, and stress-strain limits.
Choose the right piezoelectric materials and sizing them for optimum stiffness, blocking force, and displacement.
Design systems with closed-loop feedback—typically employ capacitive, strain gauge, or laser interferometer sensors—to eliminate hysteresis and creep.
Program and tune PID controllers or digital algorithms to ensure maximum bandwidth and minimal parasitic motion (pitch, yaw, and roll).
Lead prototype development, assembly, integration, and testing of motion systems, driving iterative design improvements based on test data.
Oversee system-level integration, alignment, and performance verification, with emphasis on accuracy, repeatability, drift, and environmental sensitivity.
Collaborate closely with electrical, controls, manufacturing, and cross-functional teams to ensure seamless system integration and manufacturability.
Evaluate and resolve complex engineering challenges, making independent technical decisions and trade-offs to meet product requirements.
Ensure design intent, test results, and engineering decisions are thoroughly documented to support traceability, quality, and production readiness.