Our Team


CPA, ABV, Principal

INDUSTRY EXPERTISE: Affordable Housing
Small & Midsize Businesses
DEPARTMENTS: AccountingAuditConsulting

Jeff Allen, CPA, ABV, Principal

Jeff brings more than 18 years of experience to the Maner Costerisan team. Passionate about diving into new problems and devising thoughtful, out-of-the-box solutions for clients, Jeff specializes in valuation, expert witness testimony, financial and treasury management, forecasting, budgeting, executive leadership training and financial consulting. With his ability to simplify highly-complex concepts, combined with his drive to help clients solve their problems – Jeff is exceptionally talented in devising unique solutions tailored entirely to a business’s unique needs.

After joining Maner in 2006, Jeff left the firm to work at a global medical manufacturing product corporation, gathering essential skill sets that help him more closely relate to issues and perspectives facing clients. Since returning to the firm in 2018, he’s been promoted to Principal and has taken on additional responsibilities, helping lead the firm’s growing consulting practice.

As part of his day-to-day work, Jeff provides fractional CFO services to Maner’s several small and mid-size business clients. Additionally, he focuses on providing financial consulting services to startups and distressed businesses. He also leads the firm’s business valuation services specialty and provides a wide range of valuation-related services to multiple industries.

An avid camper, hiker and outdoorsman, Jeff lives in the woods of Williamston, Michigan, with his wife, Megan, their two boys, Jonas and Evan, and their three-year-old schnoodle.

I enjoy the breadth and expanse of projects and clients I get to work with at Maner. No one client is ever exactly the same as the previous or next, which means I’m constantly challenged.

Years of Experience



American Institute of Certified Public Accountants (AICPA)

Michigan Association of Certified Public Accountants (MICPA)


Certified Public Accountant (CPA)

Accredited in Business Valuation (ABV)