Derek R. J. Greenside

Biography

Mr. Greenside practices law at Kostyniuk & Greenside in Toronto. He graduated from The University of Western Ontario in 1985, and was called to the Ontario Bar in 1987. Mr. Greenside became a Certified Specialist in Civil Litigation in 1999. His memberships include the Law Society of Ontario and the Toronto Lawyers Association and the Advocates Society. Mr. Greenside has concentrated in the area of insurance law since his call to the Bar. He has considerable experience as counsel conducting jury trials and has appeared regularly as counsel on Arbitrations at the Licence Appeal Tribunal. He also appears regularly as counsel at private Mediations and Arbitrations involving priority and loss transfer disputes. Mr. Greenside is an avid Toronto Maple Leaf supporter and refuses to accept retainers from Montreal Canadiens fans, notwithstanding his collection of hockey colleagues that continue to support the beleaguered Habs.

Reported Decisions

• Workplace Safety and Insurance Appeals Tribunal – Decision No. 402-23 (March 27, 2023)
• Pafco Insurance Company v. Wawanesa Mutual Insurance Company et al. (November 8, 2022)
• Nathaluxmy Nagarajah v. TD Insurance Company (October 26, 2022)
• Ummugulsum Yatar v. TD Insurance Meloche Monnex (June 7, 2022)
• Ummugulsum Yatar v. TD Insurance Meloche Monnex (February 28, 2022)
• Hilded Abdi v. TD General Insurance Company (February 16, 2022)
• Coachman Insurance Company v. Intact Insurance Company (January 25, 2022)
• Meloche Monnex Insurance v. Wawanesa Mutual Insurance Company (December 27, 2021)
• Juliana Arhen v. Aviva Insurance Company of Canada (December 6, 2021)
• Abdi v. TD General Insurance Company (December 6, 2021)
• Sivalingam v. Unifund Assurance Company (November 2, 2021)
• Unifund Assurance Company v. Belair Direct Insurance Company (October 6, 2021)
• Scottish & York v. Zurich Decision (August 18, 2021)
• Montesano v. Western Assurance Company (June 24, 2021)
• Yatar v. TD Insurance Meloche Monnex (April 21, 2021)
• Royal & Sun Alliance Insurance Company v. The Co-operators General Insurance Company (February 5, 2021)
• TD Insurance Company v. Certas Home & Auto Insurance Company (January 6, 2021)
• Zurich Insurance Company Ltd. v. Scottish & York Insurance (November 19, 2020)
• Unifund Assurance v. Travelers Insurance Company (September 30, 2020)
• Aviva Insurance Company v. Certas Direct Insurance Company (July 23, 2020)
• Ummugulsum Yatar v. TD Insurance Meloche Monnex (April 23, 2020)
• Unifund Assurance v. Travelers Insurance Company (April 13, 2020)
• Aviva Canada INC. v. Western Assurance Company (March 30, 2020)
• Wawanesa Mutual Insurance Company v. Ace Ina Insurance Company, State Farm Mutual Automobile Insurance Company, Aviva Insurance Company of Canada, Aviva General Insurance Company, TD Home (January 8, 2020)
• Unifund Assurance Company v. Desjardins Insurance Company (October 2, 2019)
• Scottish & York Insurance Group v Belair Direct Insurance Company (October 1, 2019)
• Scottish & York Insurance Company v. Belair Direct Insurance Company Nordic Insurance Company and Zurich Insurance Company (October 1, 2019)
• Cindee Milan v Aviva Canada (August 16, 2019)
• Aviva Canada v. Colleen Comegna (August 6, 2019)
• R.A.A. v. Aviva General Insurance (July 29, 2019)
• Wawanesa Mutual Insurance Company v. Unifund Assurance Company (July 3, 2019)
• RSA & Dominion of Canada & Her Majesty the Queen represented by the Minister of Finance (April 29, 2019)
• Ummugulsum Yatar vs. TD Insurance (April 29, 2019)
• State Farm Mutual Automobile Insurance & Certas Home & Auto Insurance Company & Unifund Assurance Company (February 28, 2019)
• Cindee Milan v. Aviva Canada (February 7, 2019)
• Pafco Insurance Company and Wawanesa Mutual Insurance Company & Western Assurance Company (December 21, 2018)
• RBC General Insurance v. TD Meloche Monnex (December 17, 2018)
• Aviva General Insurance Company v. Security National Insurance Company (December 6, 2018)
• North Waterloo Farmers Mutual Insurance v. Unifund Assurance Company (October 11, 2018)
• Economical Mutual Insurance v. Unifund Assurance Company (July 16, 2018)
• Economical Insurance v. SN Insurance & RSA Insurance (July 16, 2018)
• RSA Insurance v. Desjardins Insurance (July 10, 2018)
• Unifund v. Travelers Insurance / Dominion of Canada General Insurance (March 29, 2018)
• Allstate Insurance Co. of Canada v. Royal Sun Alliance (March 28, 2018)
• Miguel Allen v. Security National Insurance Co. / Monnex Insurance Mgmt (March 15, 2018)
• Aviva v. Intact Insurance (February 27, 2018)
• RBC General Insurance Company v. TD Meloche Monnex (January 5, 2018)
• Cindee Milan v. Aviva Canada Inc. (January 4, 2018)
• Aviva v. The Guarantee Arbitration Award by Shari Novick (November 15, 2017)
• Samantha Black v. SN Decision by Arbitrator Musson (November 15, 2017)
• Security National Insurance CO- Monex Inurance Mgmt Inc v. Miguel Allen and FSCO (October 24, 2017)
• Economical v. Unifund Decision re Preliminary Issue by Kenneth Bialkowski (September 26, 2017)
• Unifund Assurance Company v. Zurich Insurance Company (September 11, 2017)
• Unifund Assurance Company and ACE INA Insurance Company and the Personal Insurance Group (June 20, 2017)
• Royal and Sunalliance Insurance Company of Canada and Desjardins Insurance Group/Certas Direct Insurance Company (February 24, 2017)
• Colleen Comegna and Aviva Canada Inc. (February 21, 2017)
• Allen and Security National Insurance Co.-Monnex Insurance Mgmt. Inc. (July 6, 2016)
• Aviva Insurance Company and Economical Mutual Insurance Company and Unifund Assurance Company – Revised Costs Award (June 23, 2016)
• The Personal Insurance Company and Unifund Assurance Company and Ace INA Insurance Company (June 3, 2016)
• Aviva Insurance Company and Economical Mutual Insurance Company and Unifund Assurance Company (May 24, 2016)
• Jevco Insurance Company and TD General Insurance Company – Primmum Insurance Company (October 16, 2015)
• Unifund Assurance Company and TD Meloche Monnex (July 14, 2015)
• Miguel Allen and Security National Insurance Co.-Monnex Insurance MGMT. Inc. (February 3, 2015)
• Certas Direct Insurance Company and Royal & Sunalliance Insurance Company of Canada (May 8, 2014)
• Belair Direct Insurance Company of Canada and Security National Insurance Company (April 11, 2014)
• York Fire & Casualty Insurance Company and Kingsway General Insurance Company (January 15, 2014)
• TD General Insurance Company and Intact Insurance Company of Canada (September 18, 2013)
• Hunter v Richardson (August 16, 2012)
• Security National Insurance Company and The Personal Insurance Company – Certas Insurance (August 9, 2011)
• Jevco Insurance Company and Royal and Sunalliance Insurance Company (May 2011)
• Workplace Safety and Insurance Appeals Tribunal – Decision No. 1317-10 (August 19, 2010)
• Workplace Safety and Insurance Appeals Tribunal – Decision No. 822-10 (June 11, 2010)
• Workplace Safety and Insurance Appeals Tribunal – Decision No. 1098-09 (October 5, 2009)
• Aviva Insurance Company of Canada and Royal and Sunalliance Insurance Company of Canada (February 19, 2009)
• Lombard Canada Limited (Applicant) Royal & SunAlliance Insurance Company and Motor Vehicle Accident Claims Fund (Respondents) (December 19, 2008)
• Primmum Insurance Company and Aviva Canada Inc – 2008 Carswell, Ont 11427 (March 24, 2008)
• Lombard Canada Limited and Royal and Sunalliance Insurance Company and the Motor Vehicle Accident Claims Fund (February 2007)
• Royal and Sunalliance Insurance Company and Kingsway General Insurance Company (January 2007)
• Allstate Insurance Company of Canada and Royal & Sun Alliance Insurance Company (January 2006)
• Primmum Insurance Company and Royal & Sunalliance Insurance Company (September 22, 2004)
• Primmum Insurance Company and Allstate Insurance Company of Canada (September 15, 2004)
• CGU Group Canada Ltd. And Canada Life Casualty Insurance Company and Liberty Mutual Group (Feb 2004)
• Dominion of Canada General Insurance Company and Royal and Sunalliance Insurance Company of Canada (August 20, 2001)
• York Fire & Casualty Insurance Company and Royal and Sunalliance Insurance Company of Canada (October 5, 2000)
• AXA Insurance Company v. Royal Insurance (May 29, 1997)