Mechanical Design Engineer (Project Engineer)
Location: Collinsville, OK
Compensation:
• $100K–$130K based on experience
• Bonus: Performance-based (measured by design KPIs)
About the Opportunity
LHH is partnering with a fast-growing engineering and manufacturing organization on a critical search for a Mechanical Design Engineer to join their collaborative team in Collinsville, OK. This role is focused on the technical design and development of industrial steam boiler systems , specifically the Firetube product line. With a legacy of high-quality engineering, our client is scaling operations and investing heavily in product innovation and design infrastructure.
This is a hands-on, project-based role requiring strong proficiency with ASME Section I and Section VIII pressure vessel design, mechanical calculations, and CAD tools such as SolidWorks and Inventor. Candidates with a background in boilers, pressure vessels, HRSG systems, or heat exchangers will find this opportunity an excellent fit for their technical experience and growth ambitions.
Key Responsibilities
• Design and develop custom-engineered firetube boilers, pressure vessels, and related combustion equipment per ASME Section I and Section VIII
• Perform mechanical calculations using spreadsheets and formula-based code compliance tools
• Generate technical documentation and 3D models using SolidWorks and AutoCAD/Inventor
• Lead troubleshooting efforts for shop and field issues, identifying root causes and implementing corrective design updates
• Collaborate cross-functionally with Sales, QA, Purchasing, Production, and Aftermarket teams
• Support ongoing engineering improvement initiatives and product development
• Assist with QA/QC documentation updates and engineering standardization efforts
Must-Have Qualifications
• 3+ years of experience designing boilers, pressure vessels, HRSG systems, or heat exchangers
• Strong knowledge of ASME Section I (boilers) and/or Section VIII (pressure vessels)
• Bachelor’s degree in Mechanical Engineering or related field
• Proficiency with SolidWorks and/or Inventor CAD platforms
• Familiarity with combustion equipment: wind box burners, gun-type burners, scroll burners
• Ability to interpret and validate engineering spreadsheets and design calculations
• Strong communication skills and collaborative mindset
Preferred Qualifications
• 5+ years of experience in boiler/pressure vessel design
• Experience with NFPA codes and pressure combustion systems
• Supervisory experience in an engineering or drafting team
• Professional Engineer (PE) license in Mechanical or Structural discipline
• Experience with Inventor (direction of future CAD environment)
• Knowledge of ISO 9000
• Experience with pressure combustion and ancillary equipment
Work Environment & Culture
• Onsite M–F, 8:00 AM–5:00 PM
• Travel is minimal
• Highly collaborative engineering and drafting team
• Opportunity to shape the future of the product line during a high-growth period