Brad Lightcap, OpenAI's former chief operating officer and one of the company's longest-serving executives, announced his departure on Tuesday after eight years at the AI lab1,3,4.
Lightcap said on X that he is leaving OpenAI to "start something new". In an internal memo he later posted publicly, Lightcap told colleagues he had been "focused on the next horizon and what would stand in the way of mission success" and said he was "excited to help you all advance the mission from a different vantage point". He added that he would still be around for the next few weeks.
Lightcap joined OpenAI in 2018 and held a number of senior leadership roles during his tenure, including a four-year stint as the company's operating chief. He served as COO until April, when he moved into a new position focused on "special projects". OpenAI said at the time that Denise Dresser, the company's chief revenue officer, would take over most of Lightcap's responsibilities.
Lightcap and OpenAI CEO Sam Altman worked together at Y Combinator before OpenAI. Over an 18-month stretch through mid-2025, Lightcap built OpenAI's go-to-market team from around 50 people to more than 700, spanning sales, customer success, developer relations, and strategic partnerships. OpenAI's push into the enterprise market started in 2023 with GPT-4 and the launch of ChatGPT Enterprise.
The departure is the latest in a series of recent leadership changes at OpenAI. Three other executives announced their departures in April: Bill Peebles, who led OpenAI's short-form video app Sora; Kevin Weil, vice president for Science; and Srinivas Narayanan, tech chief of B2B Applications. Fidji Simo announced last month that she was stepping down from her role at OpenAI to focus on recovery after a severe exacerbation of a chronic illness.
ANALYSIS The cumulative loss of senior operators — particularly Lightcap, who scaled OpenAI's commercial organization during a critical growth phase — leaves the company navigating a period of executive turnover at the same time it is working to justify an $852 billion valuation. Dresser's assumption of most COO responsibilities in April means the operational transition was already underway months before Lightcap's formal exit.