Our Team


CPA, Manager

INDUSTRY EXPERTISE: Small & Midsize Businesses
DEPARTMENT: Accounting

Courtney Kelterborn, CPA, Manager

Courtney is a manager in the Accounting and Outsourced Solutions department. She joined Maner Costerisan as an intern in 2018 and started full-time in 2019. Courtney’s responsibilities include providing outsourced accounting consulting and support to Maner’s clients, with a special focus on supporting its telecommunications and small and midsize business clients. She is also a QuickBooks Online ProAdviser and works as part of Maner’s payroll tax team.

In college, Courtney found her passion for accounting when taking classes. She also has several family members in the profession and felt it was a good fit for her. During her internship with Maner, Courtney enjoyed the people she worked with and the variety of work she got to do, which is why she chose to stay with Maner.

Courtney graduated from Michigan State University with a Bachelor of Arts in Accounting and a Master of Science in Accounting. She lives in Mason, Michigan, and enjoys reading, crafting, baking and MSU sports.

The best advice I received at Maner was to not be afraid to take on new and challenging projects. Even if you don't have a lot of experience in those areas, Maner has lots of friendly faces who are more than willing to help when you get stuck. Taking on new challenges only increases your knowledge and abilities going forward.

Years of Experience



Certified Public Accountant (CPA)