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Senior Building Mechanical Engineer; HVAC; Water​/Wastewater

Job in Clayton, St. Louis County, Missouri, USA
Listing for: Brown and Caldwell
Full Time position
Listed on 2026-09-20
Job specializations:
  • Engineering
    HVAC Tech / Heating Engineer
  • Trades / Skilled Labor
    HVAC Tech / Heating Engineer
Salary/Wage Range or Industry Benchmark: 114000 - 155000 USD Yearly USD 114000.00 155000.00 YEAR
Job Description & How to Apply Below
Position: Senior Building Mechanical Engineer (HVAC) - Water / Wastewater

Job Description

The Senior Building Mechanical (HVAC) Engineering role takes on more complex projects and leads the development of HVAC, plumbing, and fire sprinkler calculations. The role interprets mechanical, plumbing, building, and fire codes, as well as NFPA standards relevant to commercial buildings and wastewater treatment facilities. The role includes sizing ductwork, plumbing, and fire sprinkler distribution systems, and selecting appropriate equipment. The role may draft and model these systems using AutoCAD and Revit software, and develop detailed specifications in Word and Speclink.

This position supports work in the Eastern United States. There's a preference for someone to live near our Philadelphia, Ramsey, NJ or NYC offices. This person can work hybrid from these offices if commutable or can work remote in the Northeast with a willingness to travel as needed into these offices and nearby clients.

Responsibilities
  • Develop comprehensive HVAC, plumbing, and fire sprinkler calculations for different projects.
  • Interpret mechanical, plumbing, building, and fire codes and apply them in work.
  • Understand and interpret NFPA standards and implement them correctly.
  • Effectively size ductwork, plumbing, and fire sprinkler distribution systems for optimal functionality.
  • Utilize relevant software tools to draft and model HVAC, plumbing, and fire sprinkler systems.
  • Use software solutions to create detailed specifications for HVAC, plumbing, and fire sprinkler equipment.
  • Review HVAC, plumbing, and fire sprinkler drawings/specifications for accuracy and consistency.
  • Coordinate with other engineering disciplines to ensure smooth project execution.
  • Flexibility to adapt and execute various additional assignments based on evolving needs.
Mentorship
  • May provide mentorship, guidance, support, and knowledge-sharing to help less experienced team members develop their skills and grow within their roles.
Skills and Competencies
  • Adept at interpreting and applying mechanical, plumbing, building, and fire codes as well as NFPA standards.
  • Highly proficient in software tools for drafting and modeling HVAC, plumbing and fire sprinkler systems.
  • Skilled in developing HVAC, plumbing and fire sprinkler calculations and specifications.
  • Excellent problem-solving skills for handling routine tasks.
  • Strong ability to review and coordinate HVAC, plumbing, and fire sprinkler drawings/specifications with other engineering disciplines.
  • Strong ability to work independently and provide guidance to less experienced colleagues.
Experience
  • Typically requires a minimum of 5 years of building mechanical engineering or related experience.
  • Typically certified in BC's Subject Matter Specialist (SMS) Framework, and progressing through the SMS competencies.
Preferred Skills and Experience
  • Prefer 10+ years of overall experience with a focus in Building Mechanical Engineering Design
Education
  • A bachelor's degree in mechanical engineering or related field or equivalent experience is required.
  • Has achieved or is working towards achieving professional license.
Preferred Education
  • Prefer to have already acquired a PE license
Learn more about our work:

Climate Change and Resilience
- Brown and Caldwell

Data Center Water
- Brown and Caldwell

Emerging Contaminants and PFAS
- Brown and Caldwell

Digital Solutions
- Brown and Caldwell

News
- Brown and Caldwell

Projects
- Brown and Caldwell

Industrial Water
- Brown and Caldwell

Salary Range

Location A: $95,000 - $129,000

Location B: $104,000 - $142,000

Location C: $114,000 - $155,000

Benefits and Other Compensation:
We provide a comprehensive benefits package that promotes employee health, performance, and success which includes medical, dental, vision, short and long-term disability, life insurance, an employee assistance program, paid time off and parental leave, paid holidays, 401(k) retirement savings plan with employer match, performance-based bonus eligibility, employee referral bonuses, tuition reimbursement, pet insurance and long-term care insurance.

About Brown and Caldwell

Headquartered in Walnut Creek, California, Brown and Caldwell is a full-service environmental engineering and construction services firm with 50 offices and over 2,100 professionals across North America and the Pacific. For more than 75 years, we have created leading-edge environmental solutions for municipalities, private industry, and government agencies. We strive to be the company of choice-to our clients, who benefit from our passion for delivering exceptional quality, and to our…

Position Requirements
10+ Years work experience
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