More Regions 

Colleen P. Gillis


Cooley LLP

Involvement with the 360-acre, 3.7-million-square-foot One Loudoun

Representation of the 80-acre, 5.7-million-square-foot Dulles World Center

As a partner with Cooley LLP, Colleen Gillis’ practice includes representing major developers and national, regional and local companies in land use entitlement, including office, retail, industrial, mixed-use, residential, hotel and large planned community projects. She assists clients with the interrelationship of entitlement, acquisition, financing and divestment during the life cycle of projects.

Projects in which she’s been involved include the 360-acre, 3.7 million square foot One Loudoun, a mixed-use town center. She also provided assistance and representation of the 80-acre, 5.7 million mixed-use square-foot Dulles World Center and the 200,000-square-foot Leesburg Promenade and Offices at Georgetown Park.

Gillis is a member of the Loudoun County Chamber of Commerce Board of Directors and the Dulles Corridor Rail Association Executive Committee and previously served on the Leadership Fairfax Board of Directors and the Alzheimer’s Association for the National Capital Area. She is a member of the Urban Land Institute, NAIOP and the Virginia Bar Association.

She’s been recognized by Chambers U.S.A., Best Lawyers in America and the Legal 500 U.S. The Washington Business Journal named her one of the most powerful business leaders in its Power 100 list, and the Loudoun Business Journal called her a “Woman to Watch.”

Gillis received her JD from the University of Richmond School of Law.

These are some of the reasons why we are honoring Collen Gillis with Connect CRE’s 2023 Washington DC Lawyers in Real Estate Award. The award celebrates real estate attorneys who have distinguished themselves in their practice and the larger community.


Inside The Story

Cooley's Colleen Gillis

About Amy Wolff Sorter

I love content. I love writing it, visualizing it, and manipulating it to fit into different formats. I have years of experience in working with content, both as creator and editor. The content I create and edit provides assistance with many goals, ranging from lead generation, to developing street cred through well-timed thought-leadership pieces. Content skills include, but aren't limited to, articles and blogs, e-mails, promotional collateral, infographics, e-books and white papers, website copy and more.