Ivan J. Derer, K.C.

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.

Lewis’ practice focuses on regulatory and administrative law matters involving both the electricity and oil and gas sectors including all aspects of rate applications, toll design, facilities applications, cost of capital and related matters before the Alberta Utilities Commission, the Alberta Energy Regulator (and the Canada Energy Regulator, the BCUC, OEB, Manitoba PUB, and the Canada Newfoundland and Labrador Offshore Helicopter Safety Inquiry. He has appeared at all levels of the Al...

Fred Erickson is a partner in the Energy – Oil & Gas Group. His practice focuses on significant transactional and advisory engagements, and he has extensive involvement as lead counsel in major acquisitions and dispositions, restructuring projects, project developments, joint ventures, financings, asset monetizations, securitizations and other transactional matters. Fred has considerable experience in most aspects of the upstream oil and gas and natural gas liquids (NGL) industries,...

Anthony’s practice covers a wide array of taxation law matters, providing businesses and high net-worth families with transactional tax, estate planning and tax dispute resolution advice. In 2022, Anthony was appointed King’s Counsel. Recognized for tax law in the Canadian Lexpert®, the Lexpert/ALM 500, The Best Lawyers in Canada™ guide, and as the 2021 Corporate Tax Planning Lawyer of the Year by Lawyer Monthly, Anthony is one of our co-managing partners in Calgary. Ant...

Caireen Hanert is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative and Public Law and Corporate and Commercial Litigation. Caireen, 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 Caireen is held by other top lawyers in the same geographic and legal practice area.

Amanda Marsden is a senior family and estate planning lawyer with Crossroads Law who brings a unique blend of expertise. Before focusing exclusively on family law, Amanda honed her skills at a prestigious national law firm, where she delved into the complexities of corporate law, gaining valuable insights that now give her an edge in handling high net-worth property settlements for her clients. A Holistic Approach t o Family Law Beyond her legal prowess, Amanda brings a distinctive background...

Robin Acworth is a commercial lawyer whose practice focusses on the upstream and midstream energy sectors, including LNG and renewables. Robin has extensive experience advising on energy projects and transactions in Canada and in a broad range of other jurisdictions. His experience includes advising on the sale and purchase of LNG and other commodities, transportation, construction and use of terminals, power generation facilities and other infrastructure, both onshore and offshore, including...

Marcus Archer focuses on public and private debt and equity financings, mergers and acquisitions, restructurings, reorganizations and purchases and sales of businesses and assets, acting for corporations, private equity, investment banks and creditors. He also assists clients with corporate governance, regulatory compliance, continuous disclosure and general corporate matters. Mr. Archer is a director or corporate secretary of a number of public and private corporations. Mr. Archer joined our...

Jody Sutherland collaborates with her clients to come up with creative, proactive solutions that are tailored to their specific needs. She offers timely communication, honest opinions, and a thorough analysis of the strengths and weaknesses of each case in three key areas of law: employment, litigation, and insurance defence. Jody’s significant experience representing employers in employment and human rights matters allows her to see an issue from different perspectives and understand t...

Patricia Olyslager completed her law degree at the University of Calgary and was called to the bar in 2000. Patricia completed her articles with Parlee that same year. She then moved on to another firm and rejoined Parlee in 2013, becoming a Partner in 2019. Patricia’s practice primarily focuses on litigation, specializing in insurance coverage and defence, disability, product liability, and commercial litigation. Prior to attending law school, Patricia received a degree in nursing from...