Financial Solutions Designed
to Build up Your Business.

Understanding the Green Side of Blueprints.

With client relationships as long as 20 years, we serve as a trusted construction accounting and industry partner advising on a variety of different services to help construction companies maximize profits and take advantage of tax credits. Strongly analytical, we help determine areas of focus for the future and use our rich tech expertise in financial and accounting systems, data analytics and software to help solve problems.

Maner has been valuable to us due to their support and expertise. We are extremely happy that we have Maner as our CPA.

Scott Miller, Davis Construction, Inc.

Maner is the best firm I’ve ever worked with.  They are professional, attentive and extremely skilled in every facet of business tax and accounting.  They reach out to me when they believe my business could benefit from a new program or tax change.  They are the best of the best.

– Satisfied Client

The Maner team is very knowledgeable and understanding of our needs and ALWAYS helps and treats me with respect.

Becky Reed, Motz Development

Lansing Glass has always been very happy with the service we receive from Maner Costerisan.

– Cheri Rennaker, Lansing Glass Co.

Being a Builder Means
Being a Juggler, Too.

Labor. Material. Regulations. Construction projects have no shortage of pressing issues. We provide data-driven insights to make decisions. Whether you’re large or small, a family business or a corporate firm, we take a holistic look at the business to ensure you’re making decisions today to help you reach your goals. Whether you need simple bookkeeping, a construction CPA, value growth services, strategic planning, or even succession planning, your knowledge and expertise allow us to tailor our services toward each individual business.

Goal Oriented

Focused on Client Growth

Industry Expertise

Maner Team Expert

Clayton Stiffler, CPA, CCIFP, Principal

Clayton joined Maner Costerisan in 2014. His strong work ethic and passion for problem-solving helped him quickly move up the firm ranks. He was promoted to principal in 2024. Prior to joining Maner, Clayton worked at BS&A Software, gaining experience on their Financial Management support team.

At Maner, Clayton provides accounting and outsourced expertise to a variety of clients, including small and midsized businesses, with a specialization in supporting Maner’s cannabis and construction clients. He leads the firm’s Construction team and is one of less than 2,000 professionals nationwide to receive the Certified Construction Industry Financial Professional designation.

Clayton genuinely enjoys getting to know his clients and taking an active role in helping them grow their businesses. He credits his success at Maner to focusing first on the success of his clients. He lives by the mantra that their success leads to his.

Clayton graduated from Michigan State University with a Bachelor of Science in Accounting and a Master of Science in Accounting. While in college, he was on the Dean’s List for eight semesters. A traveler at heart, Clayton’s visited all the lower 48 states and hopes to visit the last two in the next few years.

A resident of East Lansing, Michigan, Clayton enjoys attending Michigan State athletic events with friends.

Every day at Maner is different than the one before. I thoroughly enjoy being "kept on my toes.”

Years of Experience



American Institute of Certified Public Accountants (AICPA)

Michigan Association of Certified Public Accountants (MICPA)

Construction Financial Managers Association – Lansing (CFMA)


Certified Public Accountant (CPA)

Certified Construction Industry Financial Professional (CCIFP)

QuickBooks Certified ProAdvisor

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Relevant Services

Outsourced Accounting Solutions

Outsourced Accounting Solutions

Gain efficiencies and reduce stress by adding a team of experts instead of a dedicated staff.

CFO Advisory Services

CFO Advisory Services

Any size business now has access to CFO insight, data, expertise and guidance.

Business Tax Planning

Business Tax Planning

We start by focusing on your business goals, then proactively identify tax-saving opportunities.



From special projects to M&A, we offer the variety of critical consulting and advisory services you need for your business to reach its goals.

401k & Qualified Retirement Planning

401k & Qualified Retirement Planning

Our experts help organizations meet federal requirements and design benefits plans to help attract and retain top talent.

Strategic Planning

Strategic Planning

We can help businesses develop clear, practical and actionable steps to help achieve their long-term goals.

Reporting & KPIs

Reporting & KPIs

Transform your decision-making with KPIs that accurately pinpoint opportunity and tell a more complete story of your business.

Wealth Management

Wealth Management

Our holistic approach ensures you’re investing your hard-earned money properly to achieve the secure retirement of your dreams.



Expertise with complex reporting requirements that helps you navigate today’s rapidly changing business environment.


ABC of Michigan Member


Net Promoter Score


Years of Experience Serving the Construction Industry

Industry Insights

Info Sheet

Your Niche Is Our Specialty

When it comes to your unique financial needs, Maner Costerisan has the experts, tools, and services to stay focused on your next move.