Mechanical Engineer (Senior)

Location: Boxborough, MA, United States

Company

Develops precision sensing and monitoring technologies for critical environments, HVAC systems, laboratories, hospitals, data centers, and industrial applications.

What you will do

• Design and develop mechanical components and assemblies for pressure, flow, temperature, humidity, air quality, HVAC, and environmental monitoring sensors.
• Create detailed CAD models, drawings, GD&T specifications, material specifications, and tolerance analyses optimized for accuracy and manufacturability.
• Perform FEA and thermal analysis covering airflow, vibration, humidity, thermal drift, and other HVAC-relevant conditions.
• Lead prototyping, environmental qualification, and reliability testing, including pressure cycling, humidity and condensation testing, thermal shock, and leak testing.
• Optimize sensor mechanical interfaces for installation in air ducts, cleanrooms, mechanical rooms, and building automation systems.
• Collaborate with Electrical, Firmware, Test Engineering, and Manufacturing teams; drive VAVE, cost reduction, DFMEA, product improvements, NPI, and sustaining engineering activities.

Requirements

• Bachelor’s degree with 8+ years of experience or a master’s degree with 5+ years of experience in Mechanical Engineering.
• Strong background in sensor design for HVAC, building automation, industrial, or environmental monitoring applications.
• Proficiency in SolidWorks, Creo, or equivalent CAD tools, including advanced mechanical design and GD&T.
• Experience designing housings and sensing structures using metals, polymers, elastomers, and environmental-grade materials.
• Strong understanding of thermal behavior, airflow dynamics, sealing, and environmental protection, including IP ratings.
• Experience designing for machined parts, injection-molded plastics, die-cast housings, and welded or brazed sensing elements.
• Collaborative mindset, strong communication skills, and commitment to building reliable, high-performance sensing products.
• Ability to provide technical leadership and mentoring and manage multiple small to medium-sized engineering projects, including schedule and financial tracking.

Nice to have

• Knowledge of differential pressure sensing, piezoresistive or capacitive elements, MEMS, and sensor packaging for harsh environments.

Culture & Benefits

• Work on sensing technologies used in critical environments and mission-critical applications.
• Cross-functional collaboration across mechanical, electrical, firmware, test, and manufacturing engineering.
• Equal opportunity employment and reasonable accommodations for applicants with disabilities.