Catherine Lemay

Senior Legal Counsel


B.Sc. Chemistry (Honours), LL.L and LL.B


English, French, German

Bar call:

Ontario (2007), Quebec (2003-2014)



Intellectual Property

Practices in:



Catherine Lemay

Senior Legal Counsel

Who she is

With a background in chemistry, Catherine is a senior counsel with an impressive range of public and private sector experience. Her specialty is building and managing patent and trademark portfolios for clients and guiding them through the intricacies of intellectual property law. 

Hailing from Val-d’Or in Quebec, Catherine is pragmatic, direct and confident – qualities have earned her the nickname GSD (Getting “Stuff” Done). She’s also very convincing and is excellent at motivating teams to drive big projects forward. 

While Catherine’s passion for IP strategy is evident to all, she also has a commercial side to her practice, having negotiated everything from clinical trial agreements to collaborative research agreements. She has a wealth of experience doing these things across various international jurisdictions.

And she’s not afraid of a steep learning curve. She’s proven that it’s possible to work full time in law while quickly picking up German (it’s her third language), or completing a new law degree, or mastering the lost art of windsurfing.

How she got here

After graduating in law from the University of Ottawa, Catherine started as a patent specialist at a multinational pharmaceutical company based in Berlin, Germany. In 2005, she returned to Ottawa and completed her common law degree at the University of Ottawa while working as a patent officer at Health Canada. She then switched to private practice working at a reputable IP law boutique in Ottawa. After five years, she took up a position in-house at a health science company before returning to the government to lead a large team of patent specialists at the National Research Council of Canada and manage its IP portfolio. Catherine returned to the private sector in 2019 as Assistant General Counsel on IP matters for a growth company in the cannabis industry. She joined Simplex as Senior Counsel in 2022.

Catherine would love to hear from you