We Solve Your

Regulatory Puzzles

Providing Quality Service

Since it’s founding in 1981 by David McCarthy, McCarthy Consultant Services Inc. (MCSI) has played a vital role in the world of Canadian regulatory affairs. Shaped by the belief that sound regulatory management is the key to business success, MCSI has evolved into an industry leader across Canada and throughout the world. MCSI is trusted and valued by the pharmaceutical, biotechnology, medical device, food, natural health products and cosmetic industries for its efficient, timely, and effective regulatory work.


News and Events

MCSI is looking forward to a long summer weekend! Our offices will be closed Monday August 7th, for the Civic Holiday. Have fun and be safe!


Happy Canada Day from MCSI!! Happy Canada Day long weekend! Our offices will be closed on Monday July 3rd, to celebrate with friends and family. Have a great long weekend!!


Happy Victoria Day! Our offices will be closed for the Victoria Day Holiday Weekend, Friday May 19 at 5:00 PM, until Tuesday May 23 at 9:00 am. If your matter is urgent, please contact: accounting@mccarthyconsultant.com


Happy Victoria Day weekend, from MCSI! Our offices will be closed Monday May 23rd, to celebrate the day with family and friends.


We invite you to contact us!

McCarthy Consultant Services Inc.
14-320 Harry Walker Parkway North,
Newmarket, Ontario Canada L3Y 7B4

Phone: 905.836.0033
E-Mail: accounting@mccarthyconsultant.com


Let’s Get In Touch