Sr. Mechanical Designer @ NDBS

Together We Build – Partnership, Innovation, Excellence, and Safety
At Kelso Industries, 5,000+ employees across 40+ companies work together to deliver exceptional HVAC, mechanical, plumbing, refrigeration, and electrical solutions nationwide. Join us to grow your career, make an impact, and be part of a team where innovation, excellence, and safety come first.
Recruiter Notice: We respectfully ask external recruiters and staffing agencies not to submit candidates. We only accept direct applications.
ABOUT NDBS
National Design Build Services (NDBS) is a mechanical design/build firm that designs and installs heating, ventilation, air conditioning and refrigeration (HVAC/R) systems for commercial and industrial buildings. We have been entrusted with more than 500 projects across the country, including healthcare, food processing, manufacturing, warehouses, office buildings and refrigerated warehouses.
Our designs focus on energy efficiency and limit life-cycle cost for building owners. We oversee every aspect of a project, from design development through close-out and commissioning. NDBS offers a strong benefits and compensation program and real career development opportunities.
JOB DESCRIPTION
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 or Remote, Monday–Friday
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.
Why Join Kelso Industries?
Join us and be part of a team dedicated to creating efficient, sustainable, and high-performance environments that make a lasting impact across the industrial, commercial, and institutional sectors.
Here you will experience:
Growth Opportunities: Develop new skills, take on exciting challenges, and advance your career in meaningful ways.
Company Culture: You’ll thrive in an environment that supports your growth, values your contributions, and makes work fulfilling and enjoyable.
Impact: Your work directly contributes to meaningful outcomes, allowing you to see the difference you make and feel a sense of purpose every day.
Competitive Compensation & Benefits: You’ll be rewarded fairly for your contributions while enjoying perks that enhance your financial security, health, and overall well-being.
Kelso Industries celebrates diversity and is committed to creating an inclusive environment for all employees. We do not discriminate in any aspect of employment based on race, color, religion, national origin, ancestry, gender, sexual orientation, gender identity and/or expression, age, veteran status, disability, or any other characteristic protected by federal, state, or local employment discrimination laws where Kelso does business