Sr. Mechanical Engineer - Tunnel Ventilation​/HVAC Design

At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good.

Your impact

Jacobs is seeking a dynamic and experienced Senior Mechanical Engineer with Tunnel Ventilation/HVAC Professional Engineer to join our team in New York City.

• Perform and supervise calculations and detailed design of tunnel ventilation systems, equipment
• Develop designs of fire life safety systems, managing and coordinate design with other trades, such as electrical, structural and control engineers
• Provide technical and application support for engineering and design groups and coordinate design with CFD numerical modeling groups
• Perform CFD and SES modeling and mentor junior engineers to perform analysis.
• Developing design criteria, defining systems requirements, developing conceptual, preliminary and detailed design documents, completing calculations related to sizing fans, dampers, silencers and other mechanical and tunnel ventilation equipment. Perform pressure drop calculations, cooling and heating load calculations and work with vendors for selecting systems, equipment and instrumentation
• Perform field inspection, testing and airflow measurements
• Draft design documents using AutoCAD, Micro Station, BIM Revit 3D and other tools

• Bachelor of Science Degree in Mechanical Engineering is a minimum.
• 15 – 25 years of post-graduate professional years of Mechanical tunnel ventilation and HVAC design experience
• Experience with design of tunnel ventilation fans and other mechanical equipment
• Experience with inspection and testing of mechanical equipment
• Experience with CFD and SES modeling tools
• Computer aided drafting
• Ability to work in New York office and on-site as needed in a team environment co-located with the customer
• Excellent verbal and written communication skills
• Writing reports and documenting calculations, and basis of design
• Presenting design results and finding to the Clients
• Ability to adhere to schedule deadlines and budget limitations

Our health and welfare benefits are designed to invest in you, and in the things you care about. Your health. Your well-being. Your security. Your future. Employees have access to medical, dental, vision, and basic life insurance, a 401(k) plan, and the ability to purchase company stock at a discount. Eligible employees may also enroll in a deferred compensation plan or the Executive Deferral Plan.

Jacobs has an unlimited U.S. Personalized Paid Time Off (PPTO) policy for full-time salaried/exempt employees, seven paid holidays, and caregiver leave. And certain roles may be eligible for additional rewards, including merit increases, performance discretionary bonus, and stock.

The base salary range for this position is $ to $. Within the range, individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. Job posted on May 21, 2026. This position will be open for at least 3 days.

We value collaboration and believe that in-person interactions are crucial for both our culture and client delivery. We empower employees with our hybrid working policy, allowing them to split their work week between Jacobs offices/projects and remote locations enabling them to deliver their best work.

Your application experience is important to us, and we re keen to adapt to make every interaction even better. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team via Careers Support.