Skip to main content
Meet the Leadership Team

We are dedicated to making a difference.

  • Don Tomann

    Chief Executive Officer

    Don has spent the past 25 years building and directing the operations at UMC. He believes that the cornerstone of UMC’s success is its culture, and Don understands the importance of an energized vision and well-articulated values in the success of an organization. In addition to helping drive growth and continuous improvement for UMC’s customers, Don is also passionate about UMC’s community involvement and contributions. The company historically donates 4% of profits to local and national nonprofit organizations that are making a positive impact, especially in the areas of education and training. Don is a strong advocate for family-owned businesses and the role they play in strengthening our communities and the economy.

  • Sarah Sundine

    Chief Operations Officer

    Sarah Sundine has extensive knowledge and experience in quality engineering, new product launches, and both project and people management. She has a proven track record of organizing and advancing initiatives ranging from highly technical to culture and employee-oriented. Sarah’s background in quality methodologies, statistical process control, quality engineering, and her understanding of customer requirements fit seamlessly with UMC’s vision and will propel UMC’s continued growth and technical advancement in the precision parts industry.

    Sarah holds a Bachelor of Science in Metallurgical Engineering from Michigan Tech, a Master of Science in Engineering Management from the University of Michigan Dearborn, and a Project Management Professional Certification from PMI. She has a storied history of active volunteerism in Women of Today, holding titles of President and State Program Manager, Association of Women in the Metal Industries, as a Board Member, and has championed multiple fundraising efforts for various causes.

For more than 50 years, UMC has delivered quality and service beyond what our customers have experienced in the past. Our passion for building better parts, processes, and partnerships drives us to bring innovation and creativity to every project and every relationship.

Don Tomann, Chief Executive Officer