Dufferin "Duff" Harper
About Dufferin Harper
Dufferin Harper is a lawyer based in Calgary, AB and has been recognized in The Best Lawyers in Canada™ since 2008. Dufferin Harper is recognized in the following practice areas:
- Calgary, Alberta
- Administrative and Public Law
- Environmental Law
Current Firm: Blake, Cassels & Graydon LLP
Location: Calgary, AB
It takes just a few minutes to optimize your profile for clients looking to engage and lawyers who are ready to refer.
Activate your profile and highlight why your peers recognized in Best Lawyers today.
Nearby Lawyers
Crispin is the Administrative Partner of the Calgary office and practices in the areas of business law, corporate finance and securities, mergers and acquisitions, and energy. He advises clients on corporate finance, public and private M&A, corporate reorganizations, and governance matters across a range of industries, including oil and gas, oilfield services, mining, power, and manufacturing. Crispin has significant experience with corporate finance and securities transactions, including...
Vance Langford is a Calgary-based business lawyer and Managing Partner of Langford Law. Vance has over 20 years' experience working with clients to structure businesses, complete financings and transactions and resolve disputes with support from counsel for securities, tax and litigation matters. Vance’s practice includes negotiating and documenting acquisitions, divestitures, reorganizations and other complex business transactions, particularly involving multiple jurisdictions and comp...
Tom Valentine has more than 30 years of experience in the oil and gas industry, both as a barrister and a solicitor. In 2002 and 2003, Mr. Valentine lived in Doha, Qatar, where he was senior counsel (projects) with Qatar Petroleum. While in Qatar, Mr. Valentine was responsible for a number of international gas and LNG projects, including projects in the United Kingdom (Qatargas II), India (RasGas) and Spain (Endesa Generacion). Since returning to Canada Mr. Valentine’s work continues to...
Scott Sangster leads the Banking & Finance group in Calgary and is a foremost banking and finance lawyer, with extensive international and domestic experience in both bilateral and syndicated transactions. He structures and advises lenders, institutional and private, in implementing a variety of debt financing transactions, including complex inter-creditor and priority arrangements. Practicing in the private equity, agribusiness, energy, real estate, logistics (including equipment and air...
Dereck is a senior family law lawyer, having practiced exclusively in this area since being called to the Alberta Bar in 1995. Dereck holds a B.A. (Hons.) from McGill University followed by his L..L.B. from the University of Alberta. As a skilled litigator, he has appeared successfully at all levels of court in Alberta as well as in numerous arbitrations. Dereck also has extensive experience in negotiating settlements and drafting agreements. He applies a reasoned approach to his files and en...
Ryan Phillips is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative and Public Law, Alternative Dispute Resolution and Corporate and Commercial Litigation. Ryan, who practices law in Calgary, Alberta, has been recognized since 2022. 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.
Gavin Fitch is an award-winning lawyer and K.C. working in environmental, regulatory, energy permitting, and Indigenous law. He’s a respected and trusted advisor who provides sound, practical advice geared towards keeping his clients out of the hearing room. When necessary, however, he is a strong and fearless advocate, whether in negotiations or in a courtroom. His clients include developers, energy producers, environmental monitoring agencies, governments and landowners. For each indi...
Darren Hueppelsheuser’s practice concentrates on income tax law, with an emphasis on the tax aspects of financing and transaction planning for corporations and partnerships in both private and public transactions. Mr. Hueppelsheuser also advises on international tax structuring of Canadian inbound and outbound investments and the tax aspects of debt reorganizations and financial restructurings in creditor proceedings. Mr. Hueppelsheuser regularly presents on tax matters and has written ...
Katherine Rubin is an associate in Fasken’s Knowledge and Practice Innovation department, and works with the Banking and Finance group across the Firm. In this role, Katherine assists the Banking and Finance group by creating and locating resources and content to ensure the efficient and consistent delivery of high quality legal services, and by maximizing the group’s shared intellectual capital. Katherine has a broad range of experience in banking and finance law, and has represe...
Jennifer McPherson is a corporate and commercial lawyer focusing on corporate finance and securities, mergers and acquisitions, and general corporate and commercial matters. Jennifer has acted for private and public companies on a broad range of matters, including public offerings, private placements, plans of arrangement, and asset and share purchase and sale transactions. She has also advised clients on stock exchange listings, continuous disclosure matters, and corporate governance issues.
Explore and Learn
The Family Law Loophole That Lets Sex Offenders Parent Kids
by Bryan Driscoll
Is the state's surrogacy framework putting children at risk?
Recognizing Legal Leaders: The 2027 Best Lawyers Awards in Australia, Japan and Singapore
by Jamilla Tabbara
Market drivers, diversity trends and the elite practitioners shaping the legal landscape.
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Can a Green Card Be Revoked?
by Bryan Driscoll
Revocation requires a legal basis, notice and the chance to respond before status can be taken away.
New Texas Family Laws Transform Navigating Divorce, Custody
by Bryan Driscoll
Reforms are sweeping, philosophically distinct and designed to change the way families operate.
How Far Back Can the IRS Audit You?
by Bryan Driscoll
Clear answers on IRS statutes of limitations, recordkeeping and what to do if you are under review.
US Tariff Uncertainty Throws Canada Into Legal Purgatory
by Bryan Driscoll
The message is clear: There is no returning to pre-2025 normalcy.
Can You File Bankruptcy on Credit Cards
by Bryan Driscoll
Understanding your options for relief from overwhelming debt.
Musk v. Altman: The Lawyers Behind the Case
by Jamilla Tabbara
Meet the Trial Lawyers Shaping One of AI's Biggest Legal Disputes.