About Us

Sponseller Group, Inc. is pleased to announce their newest location at 1516 Target Drive in Sidney, Ohio.  This 6400 sq. ft. building will house the current staff with future expansion to 25 employees.   Brian Johnson, P.E. is the office manager and lead engineer at this location.  The building was designed in association with Buehrer Group Architects of Maumee, Ohio and had been in development for over a year.  HA Dorsten of Minster performed the general contractor duties.  The long awaited move-in came to fruition on May 31, 2022. 

Sponseller Group, Inc. is a multi-disciplined engineering firm in the Toledo area. We offer structural engineering, architectural design, facilities mechanical, and electrical design.  We attempt to provide our employees a place to work as a team, expand their understanding, gain valuable experience, and advance to a higher level in the company.   

At Sponseller Group, Inc. we have a broad range of personnel including professional engineers (PE’s), graduate engineers, senior designers, and mechanical designers.  Employees are assembled into teams enabling them to work together to complete tasks and projects.  Each department consists of a manager, structural engineers, designers, and CAD drafters.  All staff are encouraged in their professional careers, personal achievements, and community involvement.

The company was started by Harold Sponseller, P.E. a mechanical engineer who was employed at Owens-Illinois.  Originally, he offered mechanical engineering services through designers working within the office.  In the subsequent years, companies would request personnel to perform design services at their location.  He also offered mechanical design and build of complete automated machines through a wholly owned machine shop.  After thirteen years he expanded into the structural field with structural steel detailing, structural design, structural engineering services, and equipment layout services for General Motors.  We became the supplier of the majority of GM’s engineering at their Defiance facility.

Structural engineering, industrial architectural design, structural design, facilities mechanical, and electrical design have become the largest service offerings within the company.  Most project work is completed within of our offices in Holland or Sidney, Ohio.  We also partner with design/build contractors and fabricators providing them engineering and design services from our offices.  Over eighty percent of our new work comes from existing clients.

Our focus is on providing competent, quality engineering services to our clients encouraging them to return for their next upgrade.  The members of Sponseller recognize that technology and the ability to implement a comprehensive support plan makes the company a trusted resource.  Our staff of engineers and designers approaches each project with the goal of taking the client from concept to completion while participating in finding solutions for any problems that may occur.  We continually work with clients to upgrade operations for the next generation of products or adding improvements to their current production processes.

What sets us apart is our experience, attention to client needs, and responsiveness.  Our employees have a long tenure since we offer an attractive work environment, competitive salaries, benefits, and regularly updated workstations and software suites.  You will be appreciated and well compensated for your level of education and experience.

Mission Statement

To provide professional engineering and design services to manufacturers, fabricators, and contractors while providing employment and good benefits to our employees and their families. We compensate our employees at the same or better salaries that they could expect working at local competing firms in the area.

Quality Objective

To meet or exceed client expectations on accuracy, content, and delivery. We take responsibility and work through any issues that may develop.


Our people are trained with all the required safety training for lockout/tagout, fall protection, lift training, confined space, first aid, AED and CPR.

View Our Service Offerings


  • Integrity & Honesty – we do what we say and own up to our errors
  • Safety First – protect our employees and yours in the workplace and on client jobsites that result in zero safety incidents
  • Respect – treat clients, other employees, and subcontractors with the respect that they deserve
  • Attention to Detail – delivering an accurate set of drawings within a reasonable time frame
  • Leadership – be a leader at work, home and in our community
  • Commitment – we are committed to our clients’ and to our employees’ success
  • Competency – we serve our clients with appropriately qualified personnel that are seasoned professionals
  • Teamwork & Flexibility – we strive to find a way to say “yes we can solve your problem”
  • Financial Strength – the company is forty-six years strong
  • Professionalism – we’re professional in our attitude, conduct and presentation

Community Involvement

Sponseller Group supports the community through WISE – Women in Science and Engineering, WGTE public television, Cast Metal Association, Scouting, University of Toledo car competitions, Whiteford High School Robotics Team, United Way, and other organizations.