The Firm

With 12 practice groups and over 30 skilled lawyers and 40 legal assistants, law clerks and administrative support staff, Sullivan Mahoney LLP is one of Niagara’s largest law firms.

Truly client committed.

Over 65 years, we have built a reputation for impeccable service, thorough and pragmatic legal advice and complete commitment to our clients. Read more about our proud history, enduring visions and corporate values, explore career opportunities and learn how we support our local communities.

Download our corporate brochure.

The FirmTradition

Our commitment and core values have endured since our founding in 1953.

More About Tradition

The FirmCareers with Sullivan Mahoney

Be part of the largest legal team in Niagara.

More About Careers with Sullivan Mahoney

The FirmCommunity Minded

We are committed not only to our clients, but also to our community. Here is how we are giving back.

More About Community Minded

Recent Firm News

Contact Us Today

905.688.6655
St. Catharines Office

40 Queen Street,
St. Catharines, ON, L2R 5G3

Monday - Friday, 9 am - 5 pm

905.688.6655
Niagara Falls Office

4781 Portage Road,
Niagara Falls, ON, L2E 6B1

Monday - Friday, 9 am - 5 pm

905.357.3334
St. Catharines Office

40 Queen Street,
St. Catharines, ON, L2R 5G3

Call 905.688.6655

Niagara Falls Office

4781 Portage Road,
Niagara Falls, ON, L2E 6B1

Call 905.357.3334