Denver International Airport CEO Phil Washington, the man who oversaw the airport’s rapid growth during the last five years, will retire on Aug. 1, the airport announced on Wednesday.

“I am honored to have served the public for so many years,” Washington said in a press release. “But this was a long-planned decision.” 

Washington was nominated by Mayor Michael Hancock and confirmed by the Denver City Council in 2021 to lead the fourth-busiest airport in the U.S. When he took over DIA, Washington said his biggest ambitions for the airport were to prepare it for its next 50 years by expanding it by 50 to 75 gates and increasing safety and security at the airport.

He spearheaded the airport’s Vision 100 and Operation 2045, two long-term master plans toward getting the airport to support 100 million annual passengers and more.

DIA saw nearly 59 million passengers in 2021 as the airport recovered from the pandemic and Washington began his tenure.

By 2025, the airport recorded a record 82 million passengers.

Washington has more than 50 years of experience in military and public service.

He served in the U.S. Army for 24 years, rising to the rank of command sergeant major. He later worked for Denver’s Regional Transportation District from 2000 to 2015, where he was chief executive for six years. After that, he was the CEO for the Los Angeles County Metropolitan Transportation Authority.

In 2022, Former President Joe Biden nominated Washington to lead the Federal Aviation Administration, but Washington later withdrew after Senate Republicans criticized him for his lack of aviation experience and what he called “unfounded partisan attacks.”

During his time as CEO, the airport saw the completion of the expansion of concourses, improved security wait times with the opening of the East and West Security Checkpoints, and a wave of new local restaurants and businesses that are turning the airport into a dining destination.

The airport also launched a $500 million baggage system modernization project, added 30 new gates, developed the Consolidated Rental Car Facility, brought in new train cars and spurred new plans to create a pedestrian tunnel to connect all the concourses.

Earlier this year, DIA opened its new 38,000-square-foot Center of Equity and Excellence in Aviation. The first-of-its-kind aviation workforce training facility was designed to help boost opportunities for minority, women and veteran communities to work in the air travel economy and create career pathways — whether within the aviation industry or at the airport itself.

Washington also faced scrutiny over the airport buying extremely expensive flights to Madrid for airport executives with tickets costing as high as $16,000 and $19,000, a CBS Colorado investigation found. The Denver Board of Ethics cleared him in October from allegations of using public office for private gain but chastised the excessiveness of the business trip.

Recently, the city and DIA drew scrutiny and a lawsuit from passengers after a man scaled the fence and was fatally hit by a Frontier Airlines plane, with the passengers’ attorney alleging negligence and failing to properly secure the airport.

The airport’s CEO is nominated by Denver’s mayor and later confirmed by the City Council. Washington was the first CEO to need City Council confirmation after voters approved council confirmation authority in the November 2020 election.

Denver Mayor Mike Johnston commended Washington in a press release, saying he helped guide the airport through a huge period of growth that will be “felt for generations.”

“His leadership has had a transformational impact on DEN and the aviation industry, helping position our airport as a global leader in innovation, connectivity and customer experience,” Johnston said.

A spokesperson for the mayor said a nationwide search for the next CEO could begin as soon as next month.