Jim McCartney

Krysta Ostwald earned her B.A. in 1993 and her LL.B. in 1996, both from the University of Victoria. She articled with Fraser Milner and was called to the Alberta Bar in 1997. Since then she has practiced exclusively in the area of family law. Krysta worked with the firms of Laurie Allen & Associates, Turnbull Boyes and Soby Boyden Lenz, before creating Widdowson Kachur Ostwald Menzies LLP with her partners. Krysta emphasizes resolving disputes without unnecessary conflict. She utilizes ma...

Kamil Umar is a commercial real estate lawyer based in Calgary. He takes a business-minded and market-driven approach to his practice, ensuring clients receive practical and thoughtful advice on matters including property purchase and sale, land development and land use planning, condominium and strata development, leasing of all asset classes, and financing and public infrastructure work. Kamil acts for diverse clients, including residential, commercial and industrial developers, privately a...

Scott Whitby is a senior business lawyer in the Calgary office, advising companies in the oil and natural gas, power and renewable energy sectors. With more than 28 years’ of experience advising clients on a broad range of corporate and commercial matters, Scott is highly sought after for his extensive experience in relation to the purchase and sale, development, and operation of oil and natural gas, power generation and renewable energy assets and the marketing of oil, natural gas, nat...

Ryan Mullins is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Personal Injury Litigation. Ryan, who practices law in Calgary, Alberta, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ryan is held by other top lawyers in the same geographic and legal practice area.

Aaron Stephenson practises in the fields of insolvency and restructuring, commercial litigation and indigenous law. Mr. Stephenson advises all types of participants in insolvency and restructuring proceedings, both domestic and cross-border, including debtors, creditors, investors and insolvency professionals. His experience spans restructuring proceedings under the Companies' Creditors Arrangement Act, proposal proceedings under the Bankruptcy and Insolvency Act, plans of arrangement under c...

Gavin received his Bachelor of Science degree in Biology (Zoology) from the University of Calgary. He then attended the Faculty of Law at the University of Calgary, graduating in 2001. Upon graduation, Gavin clerked at the Court of Appeal and the Court of Queen’s Bench of Alberta. Following his clerkship, Gavin completed his articles at the Calgary offices of a large national law firm, practicing in securities and regulatory matters. He was called to the Alberta Bar in 2002. Gavin joine...

Mike Grassie is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation. Mike, who practices law in Calgary, Alberta, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mike is held by other top lawyers in the same geographic and legal practice area.

Carsten is a founding member and senior partner of JSS Barristers, the largest civil litigation boutique law firm in western Canada. His practice emphasizes complex and multi-party corporate and commercial litigation, commercial class actions, oil & gas litigation including royalty, environmental and CAPL issues, shareholder disputes, advising creditors and others in insolvency matters and professional negligence claims. During a leave of absence from JSS Barristers, he served as Senior L...

Glenn now practices in the areas of administrative law and civil litigation, focusing on corporate, commercial and contract litigation (including corporate and securities disputes, oil and gas litigation, contract disputes, commercial landlord and tenant disputes, land disputes, employment litigation and debt collection), wills and estates litigation, Securities Act and Alberta Securities Commission proceedings, Judicial Review hearings, real estate litigation, serious personal injury, profes...

Regina Corrigan is a partner in the Calgary office of the firm, head of the office's Business Law Department and practice group leader for its Intellectual Property Law Department. Regina's practice focuses on the areas of trademarks and technology commercialization. She has significant experience with all aspects of trademark law, including, prosecution, opposition, licensing and rights transfer in Canada. Regina also holds in-depth expertise in the commercialization and development of techn...