Jenna Rauh is a Staff Accountant who joined the firm in 2025. She is a graduate of Versailles High School and holds both a Bachelor and a Master degree in Accounting from Bowling Green State University.
Her areas of interest include payroll, accounting, and tax preparation.
Jenna resides in Versailles with her husband, Derek. She enjoys spending time with family and friends, traveling, and baking.
Elizabeth Marchal is an Enrolled Agent, which qualifies her to represent clients before the Internal Revenue Service in audits and tax related matters. She is a graduate of Fort Recovery High School and has a Bachelor of Science Degree in Accounting and Finance from Wright State University. Elizabeth has been with the firm since 2022.
Her areas of interest are payroll, accounting, tax preparation, and assisting with the office administration.
Elizabeth resides in Fort Recovery with her husband, Ben. She enjoys spending her time outdoors with family and friends.
Caitlynn Ontrop is a Staff Accountant. She joined the firm in 2022. Caitlynn is a graduate of Marion Local High School and has a Bachelor Degree in Accounting at Wright State University.
Her areas of interest include payroll, accounting, and tax preparation.
Caitlynn resides in Coldwater with her husband, Luke. She enjoys spending time with family and friends, hunting with her husband, and being outside.
Adam Diller is a Staff Accountant. He joined the firm in 2022. Adam is a graduate of Coldwater Exempted Village High School and is currently working toward his Bachelor degree in Accounting at Wright State University.
His areas of interest include payroll, accounting, assisting with tax preparation, and assisting with software setup.
Adam resides in Coldwater and enjoys spending his free time with family and friends, playing pickle ball, volleyball, and watching various sporting events.
Thomas Zender is a Staff Accountant. He joined the firm in 2021. Thomas is a graduate of Celina High School and holds a Bachelor and Master Degree in Accounting from the University of Northwestern Ohio.
Thomas specializes in tax preparation, accounting, and payroll.
He resides in Celina and enjoys spending his free time with friends & family, target shooting, playing tennis, and being outdoors.
Heather Cox became a Certified Public Accountant in August of 2024. She joined the firm in 2021. Heather is a graduate of Mississinawa Valley High School and holds a Bachelor and Master Degree in Accounting from Wright State University.
Heather specializes in accounting, tax planning and preparation, payroll, and assistance with software setup.
Heather resides in Union City with her husband, Cayden, and their two children, Maverick and Wrenley. She enjoys spending time with friends and family along with golfing, camping, working out and watching various sporting events.
Ross Gelhaus is a Staff Accountant. He joined the firm in 2020. Ross is a graduate of St. Henry High School and holds a Bachelor degree in Accounting from Ball State University.
Ross specializes in tax preparation, accounting, and payroll. He assists with financial services as a Wealth Operations Assistant.
He is a member of the Saint Henry Sons of The American Legion. Ross is an avid football fan and enjoys bowling in the Fort Recovery League. He spends his free time golfing, fishing, and taking care of his family.
Ross resides in Coldwater with his wife, Olivia, and son, Palmer.
Mary Geier joined the firm in 2018 and is an administrative office assistant during tax season. She specializes in processing tax returns, tax form 1099s, and various administrative tasks.
Mary resides in rural Coldwater with her husband, Marvin. They are parents of five children and 13 grandchildren.
She enjoys caring for family, gardening, and baking.
Lucy Gaerke is an administrative office assistant and joined Muhlenkamp & Associates LLC in 2018.
She specializes in processing & filing tax returns, annual payroll tax returns, tax form 1099s, and various administrative tasks.
Lucy resides in Coldwater with her husband, Len. They are parents of three children. She enjoys camping, reading, and spending time with family.
Carolyn Wilker joined the firm in 2018 and serves as an administrative office assistant during tax season. She welcomes clients to the office, assist clients in processing their tax return, and various administrative tasks.
She and her husband, Travis, have 7 children and reside in North Star.
She is involved in various community groups and enjoys attending her children’s sporting events.
