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Senior Mechanical Engineer (HVAC, Plumbing/FP) – 5-10 Years of Experience

O&S Associates,Inc. is a full-service Engineering and Architectural Design firm that is recognized for our expertise in building restoration and rehabilitation. We are seeking a Mechanical Engineer with 5-10 years of design and project management experience. Candidates should be experienced with the assessment, design, and construction of HVAC systems including boilers, chillers, cooling towers, pumps, fans, filtration units, air handlers, and DX systems; plumbing engineering design including piping systems, drainage systems; and delegated fire protection design for new construction or restoration.

Our firm works in many settings including low-rise and high-rise residential buildings, office complexes, retail locations, warehouses, parking garages, healthcare facilities, educational facilities, and agencies including NYC SCA, NYC DDC,DASNY, and others.


  • Perform field surveys in existing building and prepare technical reports of your findings
  • Design mechanical systems including HVAC, plumbing, and fire protection systems
  • Perform design calculations
  • Select equipment for use in building systems
  • Coordinate with structural, architectural, mechanical, and other disciplines
  • Produce construction drawings in the latest version of AutoCAD
  • Produce BIM models inthe latest version of Revit
  • Produce detailed technical specifications and bid documents
  • Maintain verbal and written communication with the Client
  • Attend and represent the firm in meetings
  • Resolve issues that are discovered in the field
  • Regular travel throughout the Tri-State area is required


  • Bachelor’s degree from an accredited University in Mechanical Engineering or Architectural Engineering
  • 5 to 10 years of Mechanical Engineering experience
  • Professional Engineer in NJ or NY is preferred
  • Working knowledge of local and national codes
  • Excellent oral and written communication skills
  • Conversant in engineering, architectural, and construction principles
  • Proficient in AutoCAD, Revit, and Microsoft Office


O&S Associates offers a highly competitive compensation package and this position offers great potential for career advancement. O&S offers generous healthcare benefits, Healthcare Savings Account (HSA) matching, 401k matching, profit sharing program, and funding for Continuing Education and Training.

About Us:

O&S Associates is a full service Architectural and Engineering Design and Consulting firm that specializes in building and parking design and restoration. We were founded in 1996 and have provided our new design and restoration services across a wide range of industries including healthcare, developers, residential, retail, airports, and government agencies over the last 26 years.

Job Type: Full-time


  • 401(k)
  • 401(k) matching
  • Dental insurance
  • Flexible spending account
  • Health insurance
  • Health savings account
  • Life insurance
  • Paid time off
  • Professional development assistance
  • Referral program
  • Retirement plan
  • Tuition reimbursement
  • Vision insurance


  • Monday to Friday

Supplemental pay types:

  • Bonus pay

Ability to commute/relocate:

  • Bedminster, NJ: Reliably commute or planning to relocate before starting work (Required)

Professional Engineering License (Required)