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Billi McCullough


555 17th Street, Suite 3200, Denver, CO 80202

Focusing on project development and finance in the energy and resources industries, Billi delivers strategic counsel and pragmatic solutions to her clients.

For over 20 years, she has focused her practice on infrastructure development, complex debt financing, and strategic transactions. Billi primarily represents project developers.

Billi’s experience is strongly focused in the energy and resources industries. She has particular knowledge counseling renewable energy clients, including developers and owners of wind farms, utility-scale solar farms, and distributed generation solar projects. Billi serves as a co-leader of the firm’s Energy and Resources industry group.

She helps infrastructure developers to successfully build, finance, and sell their projects, and works closely with companies of all types and sizes to design, develop, and implement ideal financing packages. Billi also advises clients in strategic transactions including buying and selling companies, completing complex joint ventures, and raising dedicated capital through equity transactions.

As a former chief corporate development officer for an application service provider and general counsel for an international telecommunications company, she understands the challenges her clients face and partners with them to achieve their goals.


  • Finance
    • Term and revolving credit facilities, representing borrowers, developers, and lenders
    • Debt offerings in the capital markets, representing borrowers
    • Private debt transactions, representing borrowers and lenders
  • Strategic Acquisitions and Dispositions
  • Private Equity Transactions
  • Financing and Restructuring 
  • Joint Venture Arrangements
  • Mergers & Acquisitions
  • Project Finance & Strategic Transactions 
  • Entity Selection and Formation
  • Partnering and Joint Ventures
  • Auction Processes
  • Equity Financings
  • Tax Credit Monetization
  • Construction and Term Debt Financing
  • Single-Project and Portfolio Lending
  • Joint Venture Agreements
  • Mergers & Acquisitions

Client Results

Project Finance and Strategic Transactions
  • Lead counsel in the acquisition of, and subsequent financing and loan restructuring for, two solar photovoltaic projects, 20MWs and 30MWs respectively, located in Imperial County, California. 

  • Lead Counsel in the financing of two separate portfolios of distributed generation projects in Colorado.  

  • Lead counsel to a financing party to a joint venture selling three development-stage solar farms in Southern California with a combined capacity of 100 PPA contracted MWs. 

  • Lead counsel in the acquisition from Chevron and CONSOL of undeveloped coal surface mine assets located in Wyoming and Montana. The purchase and sale included the purchase of membership interests and project assets.

  • Lead Counsel in connection with a joint venture to develop a planned deep water export terminal designed to handle commodities such as coal, grain, and potash.

  • Lead Counsel in connection with a joint venture for the exploration and eventual exploitation of mining prospects and projects in northern Chile.

  • Lead counsel to Peak Clean Energy, LLC in the sale of all of its portfolio of utility scale solar renewable energy projects.

  • Lead counsel in in the acquisition of 100% of the membership interests of two project companies that are each developing solar electric generating facilities in Idaho.

  • Lead counsel to Innergex Renewable Energy Inc. in its acquisition of the sponsor interest in a portfolio of six operating wind farms in Elmore County, Idaho.


Bar Admissions


  • The Best Lawyers in America©, Corporate Law, 2020-2022
  • Who's Who Legal, Project Finance, 2017, 2019, 2022
  • Denver Business Journal, Top Women in Energy, 2016

Professional and Civic Affiliations

  • Colorado Bar Association, Member
  • Global Energy Management Program, CU Denver Business School, Advisory Council, Chair, 2019-present

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