Mechanical Engineer III

Sterling Engineering, Inc.

📍 Worcester, Massachusetts, United States

Full-time Engineers Posted June 16, 2026

Job Description

Title: Mechanical Engineer III / Principal Mechanical Engineer
Company: Sterling Engineering
Location: Portland, ME; Worcester, MA; Plymouth, MA
Hire Type: Direct Hire or Contract-to-Hire
Compensation: $136,000 - $189,000 based on experience 


Overview: Sterling Engineering is partnering with a growing engineering organization seeking an experienced Mechanical Engineer III or Principal Mechanical Engineer to provide technical leadership and engineering expertise on complex industrial, infrastructure, utility, and energy-related projects. This role will support LNG, RNG, natural gas transmission, and distribution projects while leading engineering activities from planning and design through project execution. The ideal candidate will be a licensed Professional Engineer with strong project ...