About Our Team

Providing exceptional personal service, our team makes up a full service accounting and tax practice.

Who We Are

Our Team of Experts

Christine Whalen


T: 519-941-5526 x 201

Christine’s career started with a position as a Controller working for a start-up company, obtaining her CMA designation in 1997.  After this she moved to public accounting and spent several years working with a midsized accounting firm in Toronto, obtaining her CA designation in 1999.

She then returned to school to complete her MBA at the Rotterdam School of Management in the Netherlands. On returning to Canada, Christine worked for a boutique business valuations firm in Toronto, where she obtained her CBV designation in 2005.

Shortly thereafter she moved to the Orangeville area and started building a practice with our predecessor firm, servicing a large variety of accounting clients and providing business valuation services, before forming Whalen PC in 2010.

Christine is a member of Chartered Professional Accountants Ontario and is a licensed public accountant.  She is also a member of the Canadian Chartered Business Valuators Institute.

Norrie Tomlinson

Quickbooks Pro Advisor

T: 519-941-5526 x 202

Norrie is our in-house bookkeeping expert, she is a certified QuickBooks ProAdvisor. She is adept in solving the most complex bookkeeping issues, and has endless patience to get to the bottom of your problem and find a solution.  She is an excellent trainer as well, and can get you up and running on your own accounting package in no time at all, but she’s available anytime to help you over the phone or hands on if you get stuck.

Norrie is a long time resident of the Orangeville area. She began her career by doing bookkeeping for a family business while she raised her children, during this time Norrie completed some accounting and software courses.

In 1998 Norrie started working with our predecessor firm, and in 2013 became a certified QuickBooks ProAdvisor.

She enjoys helping clients with their bookkeeping and accounting needs, and is the firms resource for Simply Accounting and QuickBooks.

Catharine Durdevic


Cathy is your first point of contact when you visit Whalen Professional Corporation. She is always happy to help with whatever you need or can direct your enquiry to the appropriate person. Cathy came to the firm in November 2022 as our Administrative Assistant.

Cathy is a long-time resident of the Town of Erin and joined our team after raising her two children for several years. She previously worked in higher education administration for many years, providing university students with financial aid. Cathy provides support for the Whalen PC team and enjoys assisting all of our clients.