Our Team


CPA, HCCP, Principal

INDUSTRY EXPERTISE: Affordable Housing
Employee Benefit Plans

Stephanie Kossaras, CPA, HCCP, Principal

Stephanie is a principal in Maner Costerisan’s Tax department, joining the firm after completing graduate school at Michigan State University in 2014. She provides tax support, planning, and preparation to Maner’s for-profit clients, specializing in affordable housing and multi-state entities. Passionate about supporting clients in the affordable housing space, she offers consulting advice to clients on Section 42 tax credits and has passed her exam to become a Housing Credit Certified Specialist (HCCP).

In addition to her extensive affordable housing knowledge, Stephanie supports the firm’s Employee Benefit Plan specialty, helping clients ensure their retirement funds are managed properly through employee benefit plan audits.

Outgoing, friendly, and driven, Stephanie is actively engaged in numerous initiatives throughout the firm. In 2021, she chaired Maner’s employee engagement committee, leading the firm’s efforts to help increase engagement and belonging for associates throughout the pandemic. She continues to be actively engaged in the committee’s ongoing efforts.

Stephanie’s passion for accounting started in high school when she fell in love with debits and credits in one of her first accounting classes and decided to become a CPA. She worked in the accounting department for the Lansing Lugnuts throughout college and grad school, gaining valuable experience prior to transitioning into public accounting. Stephanie is always up for a challenge and is someone who thrives in a busy environment.

In her free time, Stephanie enjoys reading, playing games of all kinds, spending time with family on the lake and relaxing up north. A graduate of Michigan State University, she lives in St. Johns with her husband and Maner colleague, Nick, three animals, Willow, Sully, and Zelda, and two sons, Geo and Jackson.

I learned early on that while I could look up to others in the firm, and always have role models or go to them for guidance, my career path, progression, and focus didn't have to look like someone else's, because we are fair but not equal.

Years of Experience



American Institute of Certified Public Accountants (AICPA)

Michigan Association of Certified Public Accountants (MICPA)

International Foundation of Employee Benefits Plans (IFEBP)


Certified Public Accountant (CPA)

Housing Credit Certified Specialist (HCCP)

Advanced Defined Contribution Plan Audits