Our Team

Stephan P. McMahon

CPA & CVA

Stephan is a licensed CPA in Massachusetts & Maine, as well as a Certified Valuation Analyst (CVA), with over 12 years of experience working with closely held businesses.

Dedicated to his clients, Stephan provides valuation, tax, accounting, and management advisory services. Viewing the growth of enterprise (business) value as an integral part of an owner’s strategy and responsibility Stephan focuses on proactively identifying and communicating critical business, regulatory and accounting solutions for his clients, helping them to improve efficiency, while reducing operational costs and risk. Given the current business climate, as challenging as it is, Stephan sees it as an opportunity to bring fresh ideas and creative solutions to his clients.

Stephan is highly involved in community endeavors on the Cape. He feels strongly about leaving a positive imprint on people’s lives both through professional and personal relationships, which is exemplified by his role on the Board of Directors for the Cape Cod Chamber and as President (Past) of the Board of Directors for the Yarmouth Chamber of Commerce.

Personally, as a husband and father of two, time with family is paramount. Stephan is a perennial Little League coach in the Harwich – Chatham District, and coaches basketball in Harwich as well, and can be found on the sidelines of every Monomoy High School field hockey game – although he doesn’t understand the game at all. His latest family hobby uptake is fishing the Cape’s waters – there is a lot to still learn here but he is having fun trying!

Mary Talbot Fuller

CPA - Senior Accounting Associate

Mary Talbot Fuller, a CPA and prior Controller brings more than twenty five years of financial and business experience in public and private accounting to her role as Senior Accountant.  Her knowledge and experience with a diversification of clients serves as a basis to provide tax and business services.

After being a resident of Cape Cod for over thirty years, Mary is currently enjoying living in and exploring the Plymouth area.

Richard Budion

Accounting Associate

Richard (Richie) recently graduated from the University of Massachusetts Dartmouth with degrees in Accounting and Small Business Management.  He joined our team in November, 2017 as a staff accountant. As the newest member of our team, it wasn’t long before he was known for his hardworking, self-motivating, and detail-oriented attributes – combined with previous experience in a local accounting firm he is a true asset to our firm and our clients.

When taking a break from numbers, Richie can be found hiking, playing basketball and baseball. He was even a starting pitcher for the University of Massachusetts Dartmouth Corsairs Baseball team.

Valeryia Kazakova

Accounting Associate

In April 2018, Valeryia graduated from the New England College of Business and Finance with a degree in Business Administration and Accounting.

Prior to joining Stephan P. McMahon & Company in October 2018 as an Accounting Associate, Valeryia worked at a local bank for seven years as a Financial Services Representative Supervisor II. Her previous position allowed her to challenge herself and her team to achieve greatness in the area of customer service and productivity.

Valeryia has lived here on the Cape for 12 years now and although she loves calling it her home, she really enjoys traveling to other places. So far, she has traveled to a great deal of countries and cities but still has so many more places on her list to explore.

In her spare time, she enjoys hiking, running, rollerblading, yoga and simply staying active.

Jennifer Matts

Office Administrator

As an Office Administrator, Jenn works to support the Stephan P. McMahon & Company team while also enhancing the client experience. Her stellar internal and external client service skills are backed by more than 12 years of administrative experience. Prior to joining SPM&Co in 2018, she served in the United States Air Force performing multiple administration duties during her 12.5 years of enlistment. She also did administration work for a non-profit organization in Colorado for almost two years.

Jenn loves that her role at SPM&Co keeps her on her toes. She contributes to a myriad of company functions ranging from record keeping and marketing to tax processing. Amid the flurry of tax season is where her multitasking and organizational skills shine. She always looks forward to seeing new and familiar faces of our clients day-to-day.

Away from the office, Jenn enjoys visiting the many beaches on Cape Cod since she recently relocated here in January 2018.. Thoughtful and creative, she also enjoys decorating and doing fun DIY projects around her home.

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