Sean Marek, MAcc, CPA, CA

Founding Partner

204 992 7201 

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Al Martyszenko, CA, CFA, CBV

Founding Partner

204 992 7205

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Brittni Marek, MBA, CPA, CA


Sean obtained his CA designation in 1998 and has been a partner since 2000. He enjoys teaching professional development courses and is a past lecturer for CPA Manitoba. 

Sean completed CPA Canada's In-Depth Tax Course in 2012. His practice focuses on small and medium sized companies, as well as incorporated professionals.

Sean has held numerous board positions in the community including Habitat for Humanity (2005-2009) and Young Associates (2008-2013).

Al became a CA in 1983. He is a former partner of a national firm and  formerly served as CEO of a major building materials company. His current practice focuses on business valuations, litigation support, and corporate finance.

Brittni joined the firm in 2011 and obtained her CPA designation in 2013. She has completed CPA Canada’s In-Depth Tax Course and specializes in corporate taxation.

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Chad Reimer, CPA

Senior Manager

Chad has been with M Group since 2013 and attained his CPA designation in 2016. Chad excelled in his studies and was the recipient of the William G. Eamer, FCPA, FCA Public Accounting Award in 2017. He is currently enrolled in CPA Canada’s In-Depth Tax Course.

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Mike Cohen, CPA


Mike joined M Group in 2018 and successfully wrote the CFE to attain his CPA designation in 2019. He has over four years of accounting experience.

Matt Hannay, CPA

Senior Accountant

Claire Saunders, CPA

Senior Accountant

Richelle Healey

Accounting Technician

Josh Kleinsasser

Staff Accountant

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Amanda Maynes

Office Administrator


Joanne Ruiz

Office Administrator


Our team of seasoned professionals provide tax-efficient accounting strategies and business advice. Call or message us for a free consultation today.


We're always looking for talent. If you'd like to join our team, please submit your CV in confidence.