Sr. Mechanical Designer
National Design Build Services · Missouri
📍 St. Louis, MOvia greenhousePosted 2026-10-27
Apply on company site ↗
Career Moonshot pulls this listing straight from the employer's hiring system — no recruiter middleman, no reposts. Applying takes you directly to National Design Build Services.
About NDBS
National Design Build Services (NDBS) is a mechanical design/build firm based in St. Louis, MO. We design and deliver HVAC, refrigeration and process systems for commercial, industrial and mission-critical facilities, including, food processing, manufacturing, data centers, and refrigerated warehouses. NDBS is part of the Kelso Industries family of MEP+ companies, which shares the core values of Partnership, Innovation, Excellence and Safety. We take projects from design through fabrication and field installation, using off-site prefabrication partners where it improves schedule, quality and job-site safety. NDBS offers an excellent benefits and compensation program and strong career development opportunities.
We're looking for a Senior Mechanical Designer with 10+ years of experience in the layout and design of HVAC piping and sheet metal systems. You'll develop detailed, constructable designs in Revit, coordinate them in Navisworks and take projects from concept through installation. You'll partner with our engineers, guide junior designers, and make sure every design meets NDBS standards in the field.
POSITION INFORMATION
Item
Detail
Position Type
Full Time
Travel Required
<10%
Department
Engineering
Reports To
BIM Manager
Location
St. Louis, MO 63146
Schedule
On-site
RESPONSIBILITIES
Lay out and design HVAC piping systems, including but not limited to chilled water, heating hot water, condenser water, steam, refrigeration and condensate
Lay out and design sheet metal ductwork systems, including supply, return, exhaust and process air
Develop detailed, constructable designs in Revit to project and company standards
Run clash detection in Navisworks and resolve conflicts with other trades
Produce construction drawings, plans, sections and details directly from the Revit model
Size and route piping and ductwork with engineers, accounting for access, supports, hangers and installation sequencing
Review designs and models from junior designers, and mentor them on piping and sheet metal best practices
Participate in coordination meetings and track design issues through to closeout
Support field engineering and installation teams, including RFI responses and field changes
Maintain project documentation, model files and records
QUALIFICATIONS AND EDUCATION REQUIREMENTS
Required
Minimum 10 years' experience in mechanical design in the HVAC or MEP industry
Strong background in piping and sheet metal layout and design
Strong proficiency in Revit (MEP) and Navisworks
Working knowledge of AutoCAD, Bluebeam and Microsoft Office
In-depth knowledge of HVAC piping and ductwork systems, fittings, supports and installation practices
Ability to interpret Architectural, Structural, Civil, Electrical, Plumbing and Fire Protection documents and models
Strong written and verbal communication skills
Self-motivated, with the ability to manage multiple deadline-driven projects at once
Nice to Have
Experience in data center, healthcare, food processing, industrial or refrigerated warehouse projects
Experience producing fabrication-level sheet metal or piping models
Spool drawing experience using tools such as Victaulic Tools for Revit, Revit Fabrication or Trimble SysQue
Exposure to BIM execution plans and Common Data Environments (CDEs)
PHYSICAL & WORK REQUIREMENTS
Operate standard office equipment, computers and related software
Communicate effectively with engineers, designers, trade partners and field personnel to identify design and coordination issues and develop practical solutions
WHY NDBS
We're committed to attracting talented people who want a company with a strong foundation of success and an outstanding culture. We offer competitive compensation, comprehensive benefits and clear pathways for career advancement, with autonomy and flexibility in an entrepreneurial environment.
We’re committed to attracting talented individuals who seek a company with a strong foundation of success and an outstanding culture. We proactively provide competitive compensation, comprehensive benefits, and clear pathways for career advancement with autonomy and flexibility in an entrepreneurial environment.
Learn more about our family of operating companies at www.kelso-industries.com
NDBS is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law.
More Missouri jobs
Missouri jobs · Browse all locations