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Holland & Hart Welcomes Real Estate, Finance, and Development Partner William Callison

DENVER (July 25, 2022)—Holland & Hart announced the addition of partner J. William Callison to its Real Estate, Finance, and Development team in its Denver office. Callison brings significant experience working in close partnership with clients in the affordable housing industry, and helps clients implement creative equity and debt financing on projects in Colorado and around the country.

Callison provides strategic legal solutions for affordable housing transactions and has represented clients on hundreds of low-income housing tax credit projects from Alaska to Florida. He also has substantial experience navigating New Markets Tax Credits, federal energy credits, and historic rehabilitation tax credit deals.

“Bill’s expertise in transactions involving affordable housing and financing will be an asset to our clients,” said Hugh O’Halloran, leader of the Real Estate, Finance, and Development group. “We are committed to strategically growing our affordable and multifamily housing practice, and Bill’s diverse background in community development and finance matters will enable us to better meet our clients’ needs in Colorado and across our footprint.”

Callison is a preeminent practitioner in LLC and partnership law and is an authority on laws governing fiduciary duties. He is also sought-after as a consulting or testifying expert witness in corporate, LLC, partnership, contract, professional malpractice, and related legal matters.

“I am excited to join Holland & Hart’s talented real estate development and finance group, it feels like a natural fit for my skills,” said Callison. “The team’s expertise and perspective in community development, financing, tax, and planning are a huge asset to my clients.”

Before joining Holland & Hart, Callison spent 25 years at a large multinational law firm. He authors two major legal treatises, writes and speaks prolifically, and has served on law faculties at the University of Colorado Law School, the University of Kentucky J. David Rosenberg College of Law, and Tilburg Law School in the Netherlands, among others.

About Holland & Hart

Founded in 1947, Holland & Hart is a full-service Am Law 200 firm with offices in eight states and in Washington, D.C. We deliver integrated legal solutions to regional, national, and international clients of all sizes in a diverse range of industries. For more information, visit


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