Collaboration  |  Communication  |  Innovation

With a culture rooted in mutual respect, communication and collaboration, the leaders and associates of Thomas & Marker are passionate about building extraordinary projects from start to finish. 

By hiring high performers who share our core values, we have built a company of individuals who function as a unit.

We love what we do, and it shows in the pride we take in our innovative building solutions.


Executive Vice President

Industrial Division Manager

Vice President of Finance and Risk Management


Specialty Division Manager

Senior Living Division Manager

Vice President of Construction

Religious Division Manager

K-12 Division Manager

Vice President of Design Management

Business Development Manager



Safety Manager

Vice President of Columbus Operations



At Thomas & Marker we realize that our company’s success is directly tied to our company’s people. We place a high value on our associates and the character they exhibit through their work. It is not optional for our associates to share our values and embody our culture – it is essential. Our company culture is a reflection of our values, our mission, and our vision for the future. We are able to present strong leaders and strong teams of associates because we all share common goals. We’re approachable, we communicate authentically and transparently, and we are passionate about the work that we do. Throughout the generations of our company’s growth, the culture at Thomas & Marker has remained strong because of the people who inspire it.




Our values have been in place since the foundation of our company, but they continue to take shape in new ways through our growing team of associates. We look to these values daily when making our decisions, developing our goals, serving our clients, and supporting our associates.

Honest. Transparent. Fair.

Mutual trust is necessary for strong relationships with both clients and fellow associates. We believe open communication and ethical decision-making are crucial to earning trust. We continuously build our credibility with clients, peers, and fellow associates. Every interaction affects how others perceive our brand, and we illustrate our sincerity at every opportunity.

Passionate. Driven. Spirited.

We’re in this business because we love what we do. Our attitude sets us apart. We believe working at our company is an enjoyable experience. Our people embody this through their positive attitudes and commitment to their work. This enthusiasm fuels our determination to continually identify and pursue our goals – whether we’re teaming with associates or working with a client to build a facility.

Accountable. Dependable. Reliable.

We are committed to serving our clients and one another through responsive actions. We’re not reactive – we’re proactive, because we desire efficiency. Our commitment to safety stems from our goal of delivering quality work and the value we place on the well-being of our associates and all those affected by our construction projects. We enforce and adhere to guidelines and policies that promote safe practices – in our own facilities, and in the ones we are entrusted with building or improving.

Attentive. Considerate. Thoughtful.

Respect creates a positive environment for the exchange of ideas. True collaboration is only possible when all parties feel their opinions and actions matter. We engage others in a way that fosters empowerment and growth.

Perceptive. Understanding. Supportive.

Positive interactions hinge on one’s ability to see from another’s point of view. This is integral to all of our relationships; clients, associates, industry members, and the greater community. We not only empathize with our clients and associates, we also advocate on their behalf. A win for our clients is ultimately a win for us. We show how important these partnerships are in every word and every action.

Creative. Collaborative. Innovative.

We’re not limited by convention. We think on our feet, and we easily adapt to overcome obstacles. We can accomplish more as a team than we can as individuals, and we encourage collaborative problem solving. We recognize that each idea deserves to be heard. We don’t just value hard work; we value creative thinking.

Developing. Educating. Refining.

We are not a static company – we recognize that we’re continually evolving, and that this growth is vital to our success. We actively develop our client relationships and our processes. Likewise, we focus on the internal development of our associates; promoting diversity and offering avenues for continuing education. We seek out opportunities to set ourselves apart as the most knowledgeable and motivated team of professionals.


To provide exceptional service through collaboration and innovation for the benefit of our clients, industry, communities, and our associates.


To be a growing, vital, and vibrant organization recognized for our focused leadership, exceptional associates, and unparalleled client commitment.


  • 1956---Vintage-Photo1956

    Bob Thomas founds the Robert Thomas Construction Company. As general contractors, the company’s first projects include automotive service/gas stations, financial institutions, nursing homes, and schools.

  • 1967---T&M-Construction-Office1967

    Harold Marker joins Bob Thomas and they rename the firm Thomas & Marker Construction.

  • 1984---Wastewater-Treatment-Plant1984

    Thomas & Marker awarded the Bellefontaine Wastewater Treatment Plant

  • 1987---Air-Force-Museum1987

    Thomas & Marker awarded the 200,000-SF United States Air Force Museum Addition – the firm’s largest project at that time.

  • 1991---Freed-Center1991

    Thomas & Marker selected by Ohio Northern University to construct the Freed Center for the Performing Arts, followed by other major campus improvements and development projects.

  • 1994---Indian-Lake1994

    Thomas & Marker selected as Construction Manager for Indian Lake School District – the firm’s first major engagement as a CM.

  • 1996-Photo1996-1997

    Thomas & Marker awarded projects at both Wittenberg University and Bluffton College – the first fruits of two long-standing relationships with notable higher education institutions.

  • 2000---Marysville-Office2000

    In order to accommodate the flourishing business in Central Ohio, Thomas & Marker open the Marysville office. With two locations to handle the growing client base in Ohio, Thomas and Marker continues to set the standard for excellence in the construction industry.

  • 2007---VPP2008

    Thomas & Marker receives OSHA’s Voluntary Protection Program (VPP) accreditation. They are the 3rd mobile workforce in the United States to receive this honor.

  • 2012---Columbus-Office2012

    Thomas & Marker expands their presence in the Central Ohio market by opening a second, full-service office in Columbus.

  • 2014---TM-Associates2014

    With three generations of the Marker family providing strong leadership and guidance, Thomas & Marker has an eye to the future, informed by the integrity of its past.

“I’d rather have a handshake from Thomas & Marker than a ten percent discount and a 50-page contract from anyone else that I know in the industry.”
Phillip Connolly, Building Chair | Marysville First United Methodist Church


Providing service for the benefit of our communities is part of Thomas & Marker’s mission. We take this task seriously, and we believe that it goes beyond construction work. Through sponsorship, collaborative volunteer efforts, and contributions of time and material, our company strives to aid various causes to help those in need.

Our stewardship is perhaps most evident in our continued sponsorship of various programs that support educational and recreational opportunities for children. We truly believe that children are our future, and we greatly value programs that contribute to their growth. We have sponsored the Bellefontaine City Youth Soccer Association and Camp BraveHeart, which is a safe place for children to cope with grief from loss of a loved one. We sponsor the Bellefontaine High School Summer Enrichment Academy, which provides academic and creative challenges for motivated students in 1st-8th grades. Similarly, we sponsor an award for the high school’s Academic Booster Club’s Spring Outstanding Student Awards program. We have also sponsored the Zanesfield Ball Association.

In addition to supporting our communities’ youth, we also emphasize helping those in need. Our associates have helped collect coats, gloves, and other cold weather garments. Likewise, they have brought in school supplies purchased for the United Way’s efforts to help local schools. We have also volunteered during the winter holidays to help raise money for non-profit organizations. On Fridays, our Columbus office associates have the option to wear jeans by donating one dollar to a non-profit organization of their choice.

Many of our associates also seek out opportunities for service in their personal lives. Some participate in mentorship programs, benefit races, or even mission trips in other countries. Others are involved in local chapters of industry specific organizations.

Whether our associates are participating in a company event or a personal activity, we value their continued contributions and willingness to support those around them.