Mechanical Design Engineer III
Listed on 2026-09-21
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Engineering
Mechanical Engineer, Building Services Engineer, Environmental Engineer, Civil Engineering
King of Prussia, PA | On-Site
Company Overview
A leading 100% employee-owned MEP engineering and construction firm is seeking a Mechanical Design Engineer III to support complex projects ranging from new design-build construction to the rehabilitation of existing facilities and building systems.
The firm provides engineers the opportunity to remain technically hands-on while gaining greater project responsibility, exposure to construction, and opportunities to mentor developing engineers.
Position Overview
The Design Engineer III will lead, evaluate, design, and engineer mechanical building systems while providing ongoing technical guidance and resolving engineering challenges throughout the project lifecycle.
This position is suited for an experienced mechanical engineer who can independently solve complex design problems while providing direction to less-experienced engineers.
Key Responsibilities
- Lead the design and engineering of mechanical building systems
- Perform complex calculations and develop drawings and specifications for HVAC, plumbing, fire protection, and related systems
- Perform heating and cooling load calculations, equipment selection and sizing, friction loss calculations, and hydraulic calculations
- Develop standards and procedures for reviewing, evaluating, and inspecting designs
- Determine effective solutions to complex engineering problems
- Direct the workflow of less-experienced engineers on assigned projects
- Mentor engineers and provide technical design guidance
- Prepare technical narratives and responses to RFIs
- Support projects ranging from new design-build construction to existing facility rehabilitation
- Provide technical guidance and engineering issue resolution throughout project delivery
Qualifications
- Bachelor's degree in Engineering or related field
- Professional Engineer (PE) license required
- Minimum 5 years of experience
- Strong knowledge of HVAC, plumbing, fire suppression, and related building systems
- Strong understanding of mechanical system design and operation
- Ability to read and interpret mechanical and plumbing plans
- Strong written and verbal communication skills
Technical Skills
- Plumbing and fire protection systems
- Heating and cooling load calculations
- Equipment selection and sizing
- Friction loss and hydraulic calculations
- CADD
- Microsoft Office, including Excel
- RFIs and technical narratives
- Engineering design review and problem-solving
Featured Benefits
- 100% employee-owned company
- 401(k) with 50% company match, no cap, and immediate 100% vesting
- Medical, dental, and vision insurance — 100% employer-paid for employees
- Annual performance and company profitability-based bonus program
- Paid parental leave
- Paid holidays, vacation, and personal time
- Company-paid professional development, memberships, and licenses
- Life and AD&D insurance
- Disability income protection
- Flexible spending plans
- Employee wellness benefits
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