Thomas Ostrowerka

Ken’s practice focuses on tax litigation and tax dispute resolution. With over 30 years as a tax lawyer, he also has extensive experience in corporate tax planning, reorganizations and personal tax planning. Becoming partner at Felesky Flynn in 1996, Ken was co-managing partner from 2008 to 2015 and was appointed King’s Counsel in 2008. He has represented taxpayers before the Supreme Court of Canada, Tax Court of Canada, Federal Court of Appeal, Alberta Court of Queen’s Benc...

Aubrey is a partner based in our Calgary office and practices in all areas of commercial real estate including purchase, sale, development, financing and leasing. He has extensive experience in complex real estate transactions including both pre-development lands and lands with existing office, retail or industrial developments. He has completed transactions with various unique aspects such as environmental contamination, appurtenant water licenses, long term ground leases for development, sy...

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.

Over the 20 years Tonii Roulston has been a member of the Calgary Bar Association, she has built her long-standing reputation as a tough criminal defence lawyer. Known for her strategic thinking, and effectiveness in the courtroom, she has represented a variety of challenging and high-profile cases. As a female lawyer, she holds an advantage in vigorously questioning female complainants on difficult details including their motivations to lie and inconsistencies in their accusations. Tonii is ...

Craig’s practice covers a wide spectrum of indirect tax, income tax, resource tax, personal tax planning, and dispute resolution. In 2010, Craig was appointed King’s Counsel. With a Bachelor of Commerce and Bachelor of Laws, he has now practiced with Felesky Flynn for more than 25 years. Craig skillfully guides clients toward practical and impactful solutions. He brings a strong grasp of law, economics and relationships, allowing him to identify the best and most practical tax out...

Erin J. Runnalls is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation, Health Care Law and Medical Negligence. Erin J., 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 Erin J. is held by other top lawyers in the same geographic and legal practice area.

Sarah practices in all areas of tax law. She holds both her Bachelor of Laws and Bachelor of Science in Civil Engineering degrees from the University of Calgary. Today, she maintains her ties with the school as a sessional instructor. Prior to entering the legal profession, Sarah worked at a major oil and gas company in Calgary. She served as a law clerk to the Honourable Justices of the Alberta Court of Queen’s Bench and articled with a national firm prior to joining Felesky Flynn in 2...

Gary has been practicing as a lawyer for more than 20 years and is the managing partner of Kirk Montoute Dawson LLP. Gary also has extensive training as a Mediator and has participated in numerous Mediation, Arbitration and Judicial Dispute Resolution hearings. In addition to the practice areas of Wills and Estates, Mediation and Family Law, Gary is also an experienced litigator. He has appeared before all levels of Court in Alberta. Currently, Gary’s practice is focused primarily on Es...

Sarah Coderre is a top attorney recognized by Best Lawyers in the practice area(s) of Labour and Employment Law. Sarah, 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 Sarah is held by other top lawyers in the same geographic and legal practice area.

Tom is a leading practitioner in management-side labour and employment law with over 25 years of experience. Applying sound judgment, proactive strategies, and common sense, Tom has successfully represented employers in a wide range of complex and challenging matters. His continued success has earned him recognition from several leading industry guides as well as the respect of both colleagues and clients. With a focus on unionized workplaces, Tom advises and represents employers in labour ar...