Numerico Team | A Professional Accounting Team In Your Corner

The Numerico team has a talented group of accountants working together to help businesses and individuals achieve their financial goals. Read how in our most recent blogs.

As a leading accounting firm in Livonia, MI, listening has been the foundation of our success. We take the time to get to know our clients so we can find strategic ways to meet their accounting and tax needs, understand their struggles, and help them make sound financial decisions. 

We encourage you to learn more about our dedicated team, browse our personal and small business accounting services, and then contact us for your free consultation.

Jay Kossen, President & Lead Certified Public Accountant


Jay has been a part of the Numerico team as a Certified Public Accountant since 2001. In 2015 he became the President and Lead Associate. He started in the industry in 1998 and has previously held positions at Habitat for Humanity and the Internal Revenue Service. Jay offers common-sense solutions and accounting advice. He is knowledgeable and approaches every unique financial situation with longevity.  His main goal is to offer his clients practical advice and help them to build a strong financial future for years to come.

Jay excels at helping clients with work in multi-state jurisdictions, including Puerto Rico.  This includes extensive expertise in multi-state taxation, business, and tax consulting.  Jay was drawn to this industry knowing that each day would be very different from the rest and that each day would offer various opportunities to grow and impact people’s financial trajectory.  One of his goals is to universally help individuals and small businesses turn their financial situations around.

Many remark that Jay is exceptionally bright and well-read. When Jay says something, he means it and has thought it through. His communication is always prompt and deliberate. If he had to choose another profession he would have been a history teacher. In his limited time outside of work, he enjoys reading and exercising. One of Jay’s mantras is “Knowledge is Power.”  Some of the best advice he has been given is to choose a job he loves because then he would never work a day in his life.

One of the most impactful lessons Jay has learned is that you don’t know what you have until it’s gone.  This is why he strives to make every client feel a true difference and improvement has been made in their business and personal life by his service. He focuses his time on offering complete business advisory services – taking into account where people are in their situation right now, where they want to be and how he can help them get there.

Ashley Jackson, Accountant


Ashley graduated from the University of Michigan-Dearborn with her Masters in Accounting in 2015. She has been on the Numerico team since 2014 and previously worked at UHY as an intern for 2 tax seasons. Ashley is very interested in the whole picture. She decided accounting was right for her when she took an accounting class in high school. She loved how everything felt like a puzzle and there was always a correct solution. She decided her junior year that she would pursue this field. This was despite her parent’s warning that it would be “too boring.”

She doesn’t find it boring at all! She truly enjoys the process and prides herself on complete and accurate work. Ashley loves that each day presents a new challenge. The variety of work and opportunities are abundant at Numerico and in the accounting field. There is always something new to learn and always a supportive team to learn from. Ashley loves all types of accounting work, but really appreciates helping a client with every step of their accounting. This includes monthly accounting, quarterly financial statements, and quarterly and annual taxes. She specializes in preparing tax returns for S Corporations and analyzing the impact they have on the individual return.

If Ashley wasn’t an accountant, she would be a journalist. She hasn’t traveled very much yet but looks forward to traveling to France and the United Kingdom in the future. Ashley also likes to spend time with family and friends, shopping, and baking. She aims to surround herself with encouraging people who focus on the bright side. Ashley’s positive attitude and cheerfulness set her apart in this field. She looks forward to helping more and more small business owners who are passionate about what they do. An important thing she has learned is that if you aren’t happy, make a change! No matter how difficult it is to do, something better will work out. One of her favorite quotes is, “Facing it, always facing it, that’s the way to get through. Face it.” – Joseph Conrad

Rebecca Sitler, Accountant

Rebecca is a proven accountant with seven years of experience in the accounting field. She values good organization and open communication. Before entering the workforce, Rebecca studied at Eastern Michigan University, earning both a Bachelor of Business Administration in Accounting and a Master of Science in Taxation. 

A true go-getter, this Northville resident lives by the philosophy, “Amateurs sit and wait for inspiration, the rest of us just get up and go to work,” a quote from Stephen King. We’re very excited to have Rebecca on the Numerico team.

Coming into this new workplace, Rebecca will be specializing in trusts and estates. Estate planning is a crucial process for any asset holder, particularly older clients. She will lead this division, helping hundreds of Michigan residents sort out the details of their estate including passing on possessions to their children, identifying guardians for any minors in the family, and minimizing the taxes that one’s beneficiary will have to pay on their property. 

An estate plan is not to be confused with a will, as the latter often takes years to settle. Rebecca is available for consultation sessions to answer any questions you may have, which you can schedule at your convenience.

A true professional, Rebecca continually sets goals for herself. She strives to continue to expand her knowledge in new areas as well as achieve the CPA designation. A lifelong Michigan native, Rebecca has brought a feeling of familiarity to our clientele. She aims to be even more active in the community over the coming years.

If you’re looking to minimize family drama, mitigate ugly legal battles, and save your beneficiaries a ton of money, an estate plan is the best option, and Rebecca is the perfect person to talk to.

Gary Field, Founder

In 1980, Gary founded Numerico PC in order to provide clients an exceptional and personalized experience they could not find somewhere else.  He became a CPA in 1974 and immediately began working for Price Waterhouse, which at the time was one of the ‘Big 8’ accounting firms.

By 1998, the Numerico team had outgrown its original office and Gary built the current building with two additional suites. Gary was unlike many accountants because he knew that there was much more to accounting and financial services than crunching numbers.  He wanted each and every client to feel like they were in great hands and that they were always his priority and focus.  Gary was interested in your whole story, not just what your books said.

Gary was proud of each and every one of his associates at Numerico.  He always knew his clients were in good hands no matter who they interacted with. Gary’s mantra in business was “We are here to serve.” This mantra remains an integral part of Numerico and his legacy lives on in the service we provide to our clients.

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