Thompson Dorfman Sweatman LLP (TDS) is a Canadian, Manitoba-based law firm with its head office in Winnipeg.

On 27 May 2010, Thompson Dorfman Sweatman announced a merger with the firm Perlov Stewart LLP, which became effective June 1 that year.

[2] On 7 January 2014, the firm announced another merger with the Brandon firm Roy Johnston & Co.[3] TDS has lawyers who provide services to its clients in both Official Languages of Canada and also in Amharic (spoken), Cantonese, German, Hebrew, Italian, Mandarin, Persian, Portuguese and Tagalog.

[citation needed] On 27 May 2009 Thompson Dorfman Sweatman LLP announced the launch of Acumen Corporate Development Inc., an affiliate of the firm.

[4] Acumen focused on providing North American companies with a structured, comprehensive approach to the planning and execution of growth by acquisition, financing and other strategic opportunities.