Ivan J. Derer, K.C.

Ryan Keays practises primarily in the area of energy and resources, but also focuses on business law and corporate and commercial law. He advises clients on a broad range of corporate and commercial matters, with a specific focus on the energy sector, both domestically and internationally. His practice has included representing clients in oil and gas asset acquisitions and divestitures, share acquisitions and divestitures, negotiation of production sharing contracts and other host government ...

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

Andrew Koeman is a family law and divorce lawyer. Andrew graduated from the University of Calgary with a Bachelor of Laws (Juris Doctor) in 2009. He completed his articles with Alberta Justice and continued to work there for two years as a Crown Prosecutor in the Specialized Prosecutions Branch, focusing on complex economic crimes, before he decided to practice family law exclusively. While Andrew has experience in all areas of family law, he developed a practice with a specific focus on comp...

Jim is both a lawyer and a Chartered Professional Accountant, CA. Prior to attending law school, Jim qualified as a Chartered Accountant with Touche Ross (now, Deloitte), an international firm of Chartered Accountants in Montréal, Quebec. He began his legal career in Calgary in 1981 with Ballem McDill & MacInnes (now, Gowling WLG). Prior to joining Carbert Waite LLP in 2007 as Associated Counsel, Jim practiced tax and corporate law with the Calgary office of the national law firm, ...

Pragmatic in her approach to client service, Gillian is a versatile litigator with significant courtroom experience in the United States and Canada. With a diverse skillset, Gillian maintains a civil litigation practice primarily in the areas of insurance defence, commercial and condominium litigation. Gillian began her career as a lawyer in Nevada and California. There, she honed her skills working in private practice and as in-house counsel with a national insurance company. Industrious and...

Nancy's practice focuses primarily on the tax aspects of mergers, acquisitions and reorganizations, including cross-border transactions or financings and intragroup restructurings. She is particularly experienced in the area of resource taxation. Nancy has worked on a wide variety of transactions for multinationals, private companies, senior, intermediate and junior resource issuers and private equity groups.

Mat Wirove is an accredited mediator and reputable family lawyer, recognized for his proficiency in court. With a prior background in civil litigation, Mat's versatile legal experience equips him to tackle a broad spectrum of family law matters with skill and efficiency. A Transparent, Client-Centred Approach Mat adopts a policy of openness and honesty with his clients, keeping them thoroughly informed about their case as it progresses. He understands the unique complexities of every situatio...

Kaitlin Long's practice focuses on commercial litigation and dispute resolution within the energy industry, regulatory and environmental compliance matters and indigenous law issues. She is experienced in complex, high-stakes litigation proceedings involving contractual disputes, fraud and deceit and class actions. Kaitlin maintains a national practice and has been counsel in numerous trials, appeals and judicial review hearings, including multi-month trials. She has represented clients at al...

Carolyn maintains a corporate commercial practice with a focus on business transactions, including private and public mergers and acquisitions, private equity transactions, corporate reorganizations, and debt and equity financings. She also advises clients on corporate governance and general corporate and securities law matters. Carolyn regularly acts for Canadian and U.S. private equity firms and their portfolio companies, as well as clients in the energy sector, including midstream companie...

Darren J. Taylor is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Leasing Law and Real Estate Law. Darren J., who practices law in Calgary, Alberta, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Darren J. is held by other top lawyers in the same geographic and legal practice area.