William Colgin, Partner at Holland & Hart LLP

William Colgin

Partner at Holland & Hart LLP | Jackson, Wyoming, United States

Profile last verified July 2026
Law Practice Verified Profile Jackson, Wyoming, United States University Denver School of Law
Verified

Work Email

***@hollandhart.com

Last verified May 2026

Phone Number

+13*****

United States • Mobile

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William Colgin serves as a Partner at Holland & Hart LLP, practicing law through the firm’s Jackson, Wyoming office. He earned his legal degree from the University of Denver School of Law and contributes to an organization that delivers legal services across numerous Mountain West cities. His partnership role reflects sustained engagement with regional business clients while advancing the firm’s established commitment to diversity and inclusive workplace standards.

BEST APPROACH TO REACH William Colgin

Reach William Colgin via LinkedIn or work email by referencing his Jackson-based partnership at Holland & Hart and proposing a brief introductory conversation to evaluate how your solutions could support the firm’s broader regional legal operations.

William Colgin Socials
William Colgin Work Experience

Partner at Holland & Hart LLP in January 2019 - Present

Partner at Morgan, Lewis & Bockius LLP in May 2006 - January 2019

Tax Litigation and Controversy Partner at Fenwick and West in January 2000 - May 2006

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Tax Litigation and Controversy Associate at Fenwick and West in October 1996 - January 2000

Tax Litigation Trial Attorney, Attorney General's Honors Program, Civil Trial Western at U.S. Department of Justice, Tax Division in October 1992 - October 1996

William Colgin Education

University Denver School of Law, Juris Doctor

University of Wyoming, Master of Arts

University of Wyoming, BA

William Colgin Skills
Tax Litigation Tax Controversy Transfer Pricing Tax Law Tax
About William Colgin’s Current Company
Holland & Hart LLP

Throughout the Mountain West, from coast to coast and beyond, Holland & Hart provides clients with astute legal service from a vantage like no other. Diversity, equity, and inclusion are core values at Holland & Hart, and essential to our success. We strive to embed these fundamental principles throughout our firm and continue to build a workplace that embraces and supports everyone. For more information, visit www.hollandhart.com. Content includes attorney advertising. Locations: Anchorage, Aspen, Billings, Boise, Boulder, Cheyenne, Denver, Jackson Hole, Las Vegas, Phoenix, Reno, Salt Lake City, Santa Fe, Washington, D.C. Stay connected: Careers: hollandhart.com/careers Holland & Hart Foundation: hollandhartfoundation.org Holland & Hart Alumni: hollandhart.com/alumni-login X: @HollandHart Alumni: As a firm, we’ve always prioritized the importance of relationships with our people and our communities. Our alumni are an important part of the Holland & Hart family, whether as friends, colleagues, or even as clients of the firm. The Alumni Network creates opportunities for firm lawyers and alumni lawyers to connect, get reacquainted, and strengthen professional and personal relationships. Please visit this link to sign up today: www.hollandhart.com/alumni-login

Discover more about Holland & Hart LLP
William Colgin’s Colleagues
Steven Washington

Steven Washington

Las Vegas Metropolitan Area

Employment Attorney at Holland & Hart

Attorney at Holland & Hart LLP
(May 2022 – Present)

Andrew Lillie

Andrew Lillie

Golden, Colorado, United States

Partner at Holland & Hart

Partner at Holland & Hart LLP
(February 2022 – Present)

Greg Saylin

Greg Saylin

Salt Lake City, Utah, United States

Partner at Holland & Hart LLP

Partner at Holland & Hart LLP
(April 2019 – Present)

Gian Brown

Gian Brown

Las Vegas, Nevada, United States

Transactional Partner | M&A, Corporate Counsel and Startups -- Holland & Hart LLP

Partner at Holland & Hart LLP
(October 2013 – Present)

Mike Dill

Mike Dill

Denver, Colorado, United States

Corporate | M&A | Emerging Growth Attorney

Partner at Holland & Hart LLP
(Aug 2015 – Present)

Molly Kocialski

Molly Kocialski

Englewood, Colorado, United States

Holland & Hart

Of Counsel at Holland & Hart LLP
(Sep 2025 – Present)

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Frequently asked questions about William Colgin

What is William Colgin email address?

Email William Colgin at [email protected]. This email is the most updated William Colgin's email found in 2026.

What is William Colgin phone number?

William Colgin phone number is +1 (303) 295-8354.

How to contact William Colgin?

To contact William Colgin send an email to [email protected]. If you want to call William Colgin try calling on +1 (303) 295-8354.

What company does William Colgin work for?

William Colgin works for Holland & Hart LLP.

What is William Colgin's role at Holland & Hart LLP?

William Colgin is Partner

What industry does William Colgin work in?

William Colgin works in the Law Practice industry.

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