About Our People

Mona Tessier

Indirect Tax Specialist, Partner

“I like doing what I do because I get to deal with people on a one-to-one basis. I like working at Welch because it is a firm that really cares about its clients.”

Mona has been with Welch LLP since 1997 and was made a partner in 2021. Her public accounting background before then included four years as an Auditing and Accounting Manager and GST specialist at BDO Dunwoody plus an additional 8 years at a small local accounting firm.

Mona received her CA designation in 1990. In her current role at Welch LLP, Mona provides indirect and payroll tax advice to her clients in various industries. Mona has worked on indirect tax reviews for several national and Ottawa based not-for-profit organizations as well as some for profit organizations.

In addition, she has given presentations through various organizations on Income Tax for the Self-Employed and Financial Accounting for Small Businesses. Mona has also instructed GST/HST courses on behalf of CPA Ontario.

Mona has completed the CPA Canada In-Depth PST and GST courses.




613-236-9191 #207


View profile

Related resources

Are You Ready To Talk To A Specialist?

Get in touch, tell us your needs and we’ll assign an industry specialist to your organization.

Stay in the loop

We’ll keep you up-to-date about content and trends that are relevant to you and your business.

Follow us

Follow our social media accounts to get the latest news and opinions from our industry experts.

Find a career

Join a team that wants to help you advance your career and achieve success, whether you’re still a student or an experienced professional. We will support you every step of the way on your path to success.