Our Team


CPA, Principal

INDUSTRY EXPERTISE: Affordable Housing

Sherrie Blankenship, CPA, Principal

Sherrie joined Maner Costerisan in 2008 and was promoted to principal in 2019. In her role, she provides innovative solutions to complex issues for the firm’s affordable housing, education and nonprofit clients.

Additionally, Sherrie chairs the firm’s Career Development Committee, where she helps provide leadership and guidance to the firm’s younger staff. Her passion for helping others succeed in their careers is evident as she continues to develop programs that foster personal and professional development.

Soft-spoken, smart and genuine, Sherrie’s attention to detail, patience, strong listening skills and willingness to roll up her sleeves and give her all are intangible characteristics that make her a trusted advisor to her team and clients. Helping people work through challenges and being a part of the solution is what keeps her energized and growing.

In her free time, Sherrie enjoys spending time at her family cottage on Higgins Lake and exploring everything that Michigan has to offer with her young daughters, Jocelyn and Norah. A self-described foodie, Sherrie lives in DeWitt, Michigan, with her daughters and their beloved cat, Oreo.

I came across this saying and it has stuck with me for a long time:

"There are two things in life you are always in control over: your attitude and your effort."

Anytime I give 100% of both, I am proud of what I have done and happy with the outcome.

Years of Experience



American Institute of Certified Public Accountants (AICPA)

Michigan Association of Certified Public Accountants (MICPA)

Happendance, Inc., Vice President

Mid-Michigan Treatment Courts Foundation, Treasurer


Certified Public Accountant (CPA)

AICPA Advanced Single Audit Certificate