About Us

Plumbing and HVAC Services

For 35 years, Major Mechanical LLC has been installing plumbing and HVAC systems in hotels, multi-unit housing and senior living complexes throughout the Twin Cities Metro Area. We are committed to keeping our position as a top union mechanical contractor by ensuring that we are consistently giving exceptional service at the best possible rates. Our team will ensure that we maintain a high level of workmanship from underground to finish.


Our Company

The Penfield, at 10th and Robert streets in downtown St. Paul, features 254 apartments, a parking garage and a Lunds grocery store. (Courtesy of the City of St. Paul)

Providing customer satisfaction is our primary goal. We work with you through all phases of the project. Our staff takes pride in assisting you with working through the initial budget, selecting energy efficient equipment, and creating realistic construction timelines.

We understand the importance of value engineering in the design-build process. You can depend on us to partner and coordinate with your engineer or provide you with comprehensive engineering design through our own design build services. We will be diligent in choosing the equipment, systems, and key components that will keep the project within budget without sacrificing quality.

Our key goals are to keep a positive working environment and help the general contractors stay on schedule. To achieve this, we tap into the talents of our dedicated plumbers, pipefitters, sheet metal workers, and outstanding group of project managers and administrative staff.

Our team has extensive background in new construction, historical renovations, and rehabilitation work. We also have extensive experience with LEED buildings and green developments. We are well financed and can accomplish high workloads at single-project bonding limits. Projects we have handled in the last 10 years range from 3-unit townhomes to 400-unit housing projects.

Major Mechanical LLC is backed by a team of hardworking and dedicated employees. We have been included in the Top Women-Owned Business list of the Minneapolis/St. Paul Business Journal since 2015.

Our Team


Kristen Olson


Kristen Olson is the owner and president of Major Mechanical LLC. She has been the driving force behind the company’s incredible growth for the last 12 years. She provides key leadership to the company while maintaining the highest level of integrity. Her mission is to provide sound solutions and quality workmanship on every project, and to build strong relationships with contractors, owners, suppliers, subcontractors, and the employees of Major Mechanical.

Kristen earned her Bachelor of Arts degree in accounting from the University of St. Thomas. Her entire career has been in the mechanical contracting industry. She started in the family business at Metropolitan Mechanical Contractors, then owned by her father Tom Nelson and has been the owner of Major Mechanical since 2011. She had a good feeling about the growth potential of the multi-housing market, and she was right. Major Mechanical has grown into a dominant force in the construction business under her leadership.

Kristen serves as a member of the Twin City Pipe Trades Health and Welfare Fund’s board of directors. In addition to traveling with her husband Jonathan and their two children, Kristen enjoys golfing, horseback riding and competing in horse shows throughout the country.

CRETE Headshots

Jonathan Olson

Vice President

As Vice President, Jonathan takes pride in building strong relationships with building owners, general contractors, suppliers, and subcontractors. He also works hand in hand with project managers and job-site foreman to keep projects on time and on budget.

Jonathan has worked in the mechanical industry for more than 25 years. After graduating from Dunwoody Institute in Minneapolis, he started his career as a pipefitter at Metropolitan Mechanical Contractors before moving into the role of Vice President at Major Mechanical. He holds master contracting licenses in gas, fuel oil, high pressure steam, hot water & low-pressure steam, and refrigeration.

When he’s not in the office, Jonathan enjoys golfing and traveling with his wife, Kristen and their two children.


Kyle Sytsma, P.E

Director of Operations
Josh - 2020 Tree

Josh Giffen

Project Manager / Estimator

Brent Carlson

Project Manager / Estimator

Scott Forde

Senior Project Manager

Logan Griggs

Project Manager

Jacob Stoefen

Commercial Sales Manager

Brent Contreras

Commercial Estimator / Project Manager

Jay Johnson

Commercial Estimator / Project Manager
John Albers

John Albers

Commercial Estimator / Project Manager
Sonjia Updatd Pic 2020

Sonjia Wagner

Payroll Manager / Administrative Supervisor
New Project - 2022-05-14T093801.198

Becky Zufall

Office Manager / Fleet & Safety Coordinator

Marissa Egan

Service Dispatch / Billing

Melissa Zinnecker

Accounting Assistant
Play Video