Our Team

Jennifer Sullivan


Jennifer is a Charlotte native who graduated from UNCC with a Masters of Accountancy. She is a Certified Public Accountant and a Personal Financial Specialist. After starting her career at a small firm 2007, Jennifer purchased the firm in 2017. She and her husband, Chuck, have two children. They enjoy camping and being outdoors.

Russ Allen

Tax Manager

Russ owned Russell Allen & Associates, Inc. which was purchased by Jennifer Sullivan in 2017. Russ has over 35 years’ experience. He is a graduate of the University of North Carolina and University of South Carolina and has degrees in Business Administration and a Masters of Accountancy. He enjoys volunteering at Charlotte elementary schools and spending time on the golf course.

Harriett Furuseth

Tax Manager

Typical coffee advocate. Over 5 years of experience in Harriet is a CPA with over 30 years’ experience in public accounting, providing tax and accounting services. A graduate of East Carolina University and UNCC, she has degrees in History and Accounting. When not at Sullivan CPA, PA, Harriet enjoys spending time with her grandchildren.

Julia Wiethorn

Senior Tax Accountant

Julia has been with the firm since August of 2019. She has over 7 years’ experience in the accounting field. She is a Ohio native who moved to North Carolina in 2018. She started her career in public accounting after graduating from the University of Cincinnati in 2013.  She is a passionate supporter of nonprofit organizations and loves to volunteer.  She is a dog mom of two and enjoys kayaking, fishing, traveling and sand volleyball. 

Mike Sherman


Mike has been a Senior Tax Consultant at Sullivan, CPA, specializing in complex individual returns, for 3 years. He also serves as the firm’s financial planner which allows him to look at each client’s specific situation in a different light. He is from Potomac, Maryland and tries to be a Washington Redskins fan. 

Katarina Walker

Office Manager/Staff Tax Preparer

Kat has been with the firm since the end of 2019. She has 10 years’ experience in the administrative field. She is a Charleston, SC native and has recently moved to Charlotte to join the Sullivan CPA, PA family. Kat is a Dallas Cowboys fan. She enjoys taking road trips and spending time with family and friends.