MSD was founded in 1984, and continues to be a privately-owned business built on a reputation of quality work, service, and integrity. Our company headquarters are in Dayton, Ohio, with mechanical systems experts in Dayton, Columbus, and Cincinnati OH. We offer a range of mechanical services and are capable of handling everything from small repairs to large scale construction projects, and offer 24/7 emergency service for when you need us most.

Our Mission is to Always provide the RIGHT mechanical system solutions delivering the most reliable and advanced comfort control and protection of the environment.

Our Vision is to provide efficient and sustainable mechanical solutions improving the lives of team members, clients, and communities.

Our Core Values are Transparent, Relentless, Expertise, Supportive. Transparent in transactions and communications. Relentless in building trust in relationships by delivering on promises in an ethical manner. Expertise Trained and Specialized in delivering expertise in all we do. We love what we do! Being supportive is our enjoyment.

Meet the Team

Our team brings decades of combined experience to serve you and your business. MSD has assembled a panel of experts for each service line we offer. Contact us and tell us how MSD can help your business run at its best.

John Stewart

President / CEO

Mark Turvene

Chief Financial Officer

Jackie Tangeman, PHR & SHRM-CP

Executive Director-Human Resources/Safety

Nick Davis

Director of Business & Sales

Chris Abell

Service Operations Manager

Brad Bradley

Construction Operations Manager


MSD offers professional, skilled trades, and co-op opportunities. If you are excited about enhancing and building a rewarding career, MSD may be the solution. As an associate of MSD, you can expect an environment that encourages you to perform at the highest level in all of your pursuits. Sharpen your skills, grow your confidence, and maintain a productive balance between life and work.

To apply for any of our open positions, submit a resume to our Human Resources department at Careers, or by visiting MSD headquarters at 4401 Springfield St., Dayton, OH 45431 Monday-Friday from 7:30am-4:30pm. MSD is proud to offer a range of benefits to provide security today, and plan for a satisfying retirement. In addition to medical, dental, vision, voluntary life insurance coverage, short term disability, profit sharing and 401k options, our employees enjoy:

  • Competitive Wages
  • Challenging and rewarding work
  • A range of working environments
  • Training and education opportunities
  • Career advancement opportunities

MSD has an Equal Employment Opportunity policy for recruiting, hiring, training, and promoting persons in all job titles, without regard to race, color, religion, national origin, age, marital or veteran status, handicap and sex except where sex is a bona fide occupational qualification


Working for MSD isn’t just a job that pays the bills today. We invest in our employees by offering continuing education through our Mini-University, apprenticeship programs, and leadership training.

We realize that our future depends on our employees, therefore your continued growth and development is as important to us as it is to you.

School-to-work for High School Seniors:

  • High School Seniors participating in a Career Center
  • Opportunities are available for the company-paid tuition to apprenticeship program
  • Earn valuable construction experience
  • College Co-ops or Internships for College Students:

Construction Management students:

  • CAD Design students
  • Gain experience in project management, estimating, drafting, field applications, and more

College Graduates:

  • Project Engineers
  • Project Management
  • Estimating