Engineer, Mechanical

Join JB&B and shape the future of the built environment! 



 
Founded in 1915, Jaros, Baum & Bolles has been a pillar of engineering innovation in New York City for over a century. Specializing in  mechanical, electrical, plumbing (MEP) , JB&B has contributed to some of the most iconic buildings. 

In  October 2025 , JB&B joined forces with  Trinity Consultants, a global consulting firm focused on the natural and built environments. JB&B now operates within Trinity’s Built Environment division , combining its deep expertise in high-performance building systems with Trinity’s strengths in  acoustic design, facility operations, commissioning, and technology strategy. 

This strategic merger expands JB&B’s capabilities and offers employees: 

• Access to a broader portfolio  of international projects and clients 

• Enhanced career mobility  across Trinity’s global network 

• Interdisciplinary collaboration  with experts in sustainability, environmental science, and digital infrastructure 
  
  
  
   

About the Role
We are seeking qualified, confident, and collaborative Entry-Level Engineers to join our HVAC and Plumbing & Fire Protection departments in our Philadelphia office. This is an exciting opportunity to launch your engineering career with a firm known for innovation, mentorship, and technical excellence.

As an Engineer at JB&B, you'll work on a wide variety of projects-ranging in size, complexity, and duration-across multiple sectors. You'll collaborate with senior engineers and partners, gaining hands-on experience while contributing to meaningful client solutions.

Key Responsibilities

• Complete tasks on fit-out, base building, and infrastructure upgrade projects
• Assemble riser diagrams, schedules, and floor plans
• Assist in planning and coordination of major distribution systems, equipment rooms, closets, shafts, and risers
• Review shop drawings and perform site visits and punch lists under senior supervision
• Design HVAC systems including distribution, recirculation, and exhaust
• Design plumbing systems including water, gas, and waste distribution
• Work on facility utilities such as chilled water, heating water, steam, and condensate
• Lay out sprinkler systems and perform basic calculations for pipe sizing, design densities, and pump horsepower

Minimum Qualifications

• Bachelor's degree in mechanical engineering or a related field (by Summer 2026)
• Strong analytical, communication, and organizational skills
• Eagerness to learn and grow in a collaborative environment
• Interest in building systems, sustainability, and innovative design 

Why Work at JB&B?

• Legacy + Innovation: Our company blends a rich history with forward-thinking design, including smart building systems and deep carbon reduction strategies. 

• Collaborative Culture: With over 400 professionals, our company fosters mentorship, teamwork, and continuous learning. 

• Global Impact: Now part of Trinity, our company offers opportunities to work on transformative projects across commercial, healthcare, aviation, life sciences, and data center sectors. 

• Multiple office locations: New York, Boston and Philadelphia. 

What We Offer

• Hybrid workplace offering the flexibility to work both from home and the office 

• Comprehensive benefits package including 401k employer match and stock options 

• Paid time off (PTO), volunteer program and employee resource groups 

• Training and professional development courses through JB&B University 

Estimated compensation range: $79,000-$82,000 annual salary

Jaros, Baum & Bolles is an equal opportunity employer. All qualified candidates will receive consideration for employment without regard to race, ethnicity, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, marital status, military veteran status, unemployment status, or any other status protected by law.