Category Facilities
Description We9re looking for a Senior Mechanical Engineer to join our growing Facilities division in Philadelphia, PA. This is more than just a job - it9s a chance to shape your career, grow alongside a collaborative team, and help design the future of infrastructure solutions across the country.
Position SummaryThe Senior Mechanical Engineer will lead the design and analysis of HVAC, plumbing, and mechanical building systems for a diverse range of commercial, industrial, and institutional projects. In this role, you will manage all phases of project delivery, from planning and design to construction administration. Additionally, you will serve as the primary client contact and provide technical mentorship to junior staff.
Key Responsibilities - Lead the design and analysis of HVAC, plumbing, mechanical, and building systems for complex infrastructure and facilities projects.
- Serve as the primary point of contact for clients, managing relationships and ensuring project goals are met on time and within budget.
- Oversee all project phases, including planning, design, specifications, construction documents, bidding, and construction administration.
- Mentor and provide technical guidance to junior engineers and project staff.
- Coordinate across multidisciplinary teams, including electrical, architectural, and civil disciplines.
- Conduct code analysis and ensure compliance with applicable standards and regulations.
Qualifications & Skills - Bachelor9s Degree in Mechanical Engineering or related field required.
- PE licensure preferred; EIT considered for candidates actively pursuing licensure.
- 6 to 12 years of mechanical design experience in commercial, industrial, and institutional building facilities.
- Strong working knowledge of Revit MEP, AutoCAD, and MS Office.
- Demonstrated ability to manage project budgets, schedules, and client relationships.
- Superior organizational and interpersonal skills with the ability to work effectively across multidisciplinary teams.
- Sustainable design experience with LEED accreditation a plus.
Why Join Us? - Career Growth: Accelerate your professional career with opportunities to lead, learn, and expand your expertise.
- Collaborative Culture: Work alongside multidisciplinary teams that thrive on creativity, support, and teamwork. Collaborative is the most frequent word used to describe MJ9s culture in the annual employee survey.
- Employee Ownership: As a 100% ESOP, your contributions directly shape our shared success - you own your future.
- Innovation & Impact: Work on projects that push boundaries, drive sustainability, and create real-world solutions.
- Professional Development: From mentorship, ongoing technical training, and conferences we invest in your growth every step of the way.
- Work-Life Balance: Enjoy flexible schedules, generous PTO, and a culture that values balance so you can thrive both professionally and personally.
- Shape the next generation: For experienced professionals, MJ offers the chance to mentor emerging talent, share your expertise, and leave a lasting legacy in the industry.
Benefits & Perks - Competitive base salary with a performance-based incentive payment plan/bonus structure.
- Comprehensive benefits package, including medical, dental, and vision coverage.
- Generous Paid Time Off, including Parental Leave.
- Company-funded ESOP + 401(k) employer match.
- Ongoing technical training and professional development opportunities.
Join Us and Make a DifferenceJoin a team where
your work has purpose, your ideas are valued, and your growth is personal. Apply today and become a part of a company where you can
#ownyourfuture.
Position RequirementsFull-Time/Part-Time Full-Time
Shift Days
CityStateKeywordsPay RangePosition Junior Mechanical Engineer
Exempt/Non-Exempt Non-Exempt
Open Date 3/26/2026
This position is currently accepting applications. 
