Dennis P. Langen
About Dennis P. Langen
Dennis P. Langen is a lawyer based in Calgary, AB and has been recognized in The Best Lawyers in Canada™ since 2015. Dennis P. Langen is recognized in the following practice areas:
- Calgary, Alberta
- Administrative and Public Law
- Energy Law
- Energy Regulatory Law
- Environmental Law
- Natural Resources Law
- Oil and Gas Law
Current Firm: Stikeman Elliott 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
Family Lawyer for 30+ years. Mediator for 25+ years. Arbitrator and parenting coordinator for 15+ years. Current Co-Chair of the Alberta Family Lawyers Association; Past President for the Canadian Bar Association (CBA) Alberta Branch; Past National Chair for the Family Law Section of the CBA; Background in psychology and corporate litigation.
Elizabeth Burton is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law. Elizabeth, 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 Elizabeth is held by other top lawyers in the same geographic and legal practice area.
Zafar Jaffer is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. Zafar, 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 Zafar is held by other top lawyers in the same geographic and legal practice area.
Clint Suntjens is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Personal Injury Litigation. Clint, 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 Clint is held by other top lawyers in the same geographic and legal practice area.
Jill Wilkie is a trusted advisor to employers and specializes in advising on all aspects of labour and employment law, and is the Leader of Miller Thomson’s Labour & Employment Group. She has developed significant expertise in assisting clients in the health, manufacturing and education industries, as well as in Alberta’s Indigenous communities. Jill’s experience includes advising on the discipline and dismissal process, the defence of wrongful, constructive and unjust d...
Regina Corrigan is a partner in the Calgary office of the firm, head of the office's Business Law Department and practice group leader for its Intellectual Property Law Department. Regina's practice focuses on the areas of trademarks and technology commercialization. She has significant experience with all aspects of trademark law, including, prosecution, opposition, licensing and rights transfer in Canada. Regina also holds in-depth expertise in the commercialization and development of techn...
Thomas Cumming is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Financial Restructuring Law. Thomas, 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 Thomas 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...
Shanlee’s practice is focused on securities and capital markets, mergers and acquisitions, private equity, start-ups, shareholder activism and corporate governance. Shanlee has a business-friendly, “get the deal done” mentality, enabling her to develop close and trusting business relationships while delivering practical, timely and high-value advice on an array of complex legal issues and transactions. Shanlee has extensive experience advising clients on domestic and cross-b...
Jamie Flanagan is an experienced advocate who has guided his clients through difficult times for more than 30 years. Focusing on civil litigation, he handles commercial and construction litigation, employment law disputes, and estate litigation. When a matter proceeds to trial, Jamie has the litigation experience to aggressively and thoroughly pursue his clients' interests. He has appeared before the provincial, superior, and appeal courts of Alberta, British Columbia, and Saskatchewan on a w...
Explore and Learn
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.
What AI Visibility Means for Lawyers
by Josh Rupall and Bryan Driscoll
AI tools increasingly interpret lawyers public information. Clear, consistent and credible sources help ensure they describe legal expertise accurately.
Musk v. Altman: The Lawyers Behind the Case
by Jamilla Tabbara
Meet the Trial Lawyers Shaping One of AI's Biggest Legal Disputes.
Can You Go to Jail at an Arraignment?
by Bryan Driscoll
Understanding What Happens at Your First Court Appearance.
The Best Lawyers in France 2027: Peer-Reviewed Excellence
by Jamilla Tabbara
Seventeen editions of peer trust, a growing profession and a dynamic legal market.
Announcing the 2027 Best Lawyers Awards: Austria, Germany and Switzerland
by Jamilla Tabbara
Celebrating the legal professionals throughout Central Europe.
When Is It Too Late to Stop Foreclosure?
by Bryan Driscoll
Understanding the foreclosure timeline, critical deadlines and the legal options that may still protect your home.
The Legal Teams Behind the Blake Lively–Justin Baldoni Settlement
by Grace Greer
A closer look at the legal teams and attorneys involved in the Blake Lively–Justin Baldoni litigation and its resolution.
How AI Is Changing the Way Clients Find Lawyers
by Jamilla Tabbara
Best Lawyers CEO Phil Greer explains how AI-driven search tools are reshaping legal marketing and why credibility markers matter.