Talent
Mary Casto
Production Manager
I have been with the company since 2003, starting as the Assistant Production Supervisor, then moving into the Production Supervisor’s position. It has been a great experience to grow with the company and work with all of the departments as one team truly working toward one goal – customer satisfaction.
Jim Collene
Vice-President of Engineering
I reside just outside Mansfield and am a graduate of Ohio Northern University with a bachelor’s degree in Mechanical Engineering. I have been with MEC since 2002 and in the role of VP of Engineering since 2022. I enjoy helping our customers find mechanical hinge solutions for their products. My many years of experience and customer interactions allow me to effectively support and guide our team at Mansfield. The work is very rewarding and the family atmosphere at MEC makes coming to work each day easy. In my personal life I love spending time with my family and as a lifelong Ohio sports fan, I enjoy rooting for OSU and Cleveland sports teams.
Bruce Cummins
CEO and Board Chair
My brother Steve and I founded Mansfield Assemblies Co. in 1987. I became President of Mansfield Industries in 2004 and today lead Mansfield Engineered Components with an external focus on marketing and growth and an internal focus upon finance and administration. I am a graduate of Kenyon College and The Lawrenceville School. My wife Geneva and I have lived most of our lives in Mansfield and have two adult children with whom we enjoy traveling, skiing and nearly all things water. I have a keen interest in maps and the weather.
Nick Harvey
Manufacturing Engineering Manager
I have been with Mansfield Engineered Components since the beginning of 2012. I am a graduate of The University of Toledo with a bachelor’s degree in Mechanical Engineering. I live in the Mansfield area with my wife and we enjoy being outdoors and camping. It is great to be part of the Mansfield team and to work towards our number one goal, customer satisfaction.
Jessica Stumbaugh
Procurement Manager
I joined MEC in 2025. I am a graduate of Ashland University earning my Master of Business Administration. I have several years of purchasing experience in the manufacturing industry and enjoy working with suppliers to find the best possible solutions for our customers. I always look for opportunities to apply Lean principles to activities to streamline processes and improve efficiency. I have resided in Ashland County all my life and enjoy spending as much possible time as I can with my granddaughter.
Michael Kelley
Controller
Rhonda Johnson
Customer Service Manager
Rhonda.Johnson@mansfieldec.com
I have been with Mansfield since 2006. I have engaged in a variety of responsibilities that connect to inventory, prior to Customer Service Manager. I have watched our company grow, with our staff working together to meet or exceed customer expectations. I take pleasure in helping and serving people and I’m grateful to be part of this team. Outside of work, I enjoy serving in my church as well as camping with family and friends.
Nick Sir Louis
Design Engineering Project Manager
I have been with the company since 2006 and have served as a project engineer for that entire time. I am a graduate of Kettering University (formerly G.M.I.) where I received my bachelor’s degree in Mechanical Engineering. I embrace the challenges I face in design and development and am confident that we can find solutions for each customer. Outside of work I enjoy pretty much all thing outdoors as well reading and spending time with my family.
Dave Treace
President and COO
Born and raised in Mansfield, I am a graduate of The Ohio State University bachelor’s degree in Mechanical Engineering. I have been with the company since late 2006 as the Director of Operations. I have spent over 20 years managing design engineering and manufacturing operations, creating and analyzing data, and using a teamwork approach to problem solving. I’m passionate about developing people, leading process improvements, using Lean Manufacturing and Six Sigma tools, and continuously creating a culture of open and honest communication with accountability. I live near Columbus with my wife and two daughters, and enjoy golf and running.
Brian White
Design Engineering Project Manager
I am a lifelong resident of the Mansfield area and have been with the company since 2006. I graduated from Miami University (Ohio), with a bachelor’s degree in Electro-Mechanical Engineering. I live in the rural outskirts of Mansfield with my beautiful wife and three adorable daughters. I enjoy woodworking, home remodeling, reading, gardening, board games, camping, and helping lead our local Cubscout Pack.
