Former OpenAI Executive Ryan Beiermeister Joins Founders Fund as Partner

Ryan Beiermeister, the former OpenAI vice president of Product Policy, has joined venture capital firm Founders Fund as a partner. She announced the move on Monday, returning to the startup and investment world after leaving OpenAI earlier this year.

Beiermeister spent nearly two years at OpenAI during one of the company’s most transformative periods, helping oversee product policy as ChatGPT became one of the fastest-growing consumer applications in history. Her tenure ended in February after reports said she objected to a proposed ChatGPT feature known as “adult mode,” which would have allowed adults to use the chatbot for erotic content. The Wall Street Journal also reported that her dismissal involved allegations of sexual discrimination made by a male colleague. Beiermeister strongly denied the claims, saying any allegation that she discriminated against anyone was “absolutely false.” OpenAI later dropped plans for the feature in March.

In recent months, Beiermeister also became familiar to many in Silicon Valley through Founders Fund’s YouTube series Mafia, where prominent technology executives compete in the social deduction game. She appeared alongside OpenAI CEO Sam Altman, Anduril founder Palmer Luckey, Figma CEO Dylan Field, Flexport CEO Ryan Petersen, Founders Fund partner Trae Stephens and several other industry figures.

One of the most memorable moments in the series came when Beiermeister and Altman each suggested that if either of them were eliminated from the game, the other should be considered the likely Mafia player. The exchange quickly attracted attention from viewers already familiar with the history surrounding Beiermeister’s departure from OpenAI.

Following her appearance, some social media users speculated that the game itself had served as an unofficial job interview with Founders Fund. The venture capital firm dismissed those claims, saying Beiermeister’s performance in the game had no connection to the hiring decision. A company spokesperson said she had known Trae Stephens since their time working together at Palantir and had maintained a longstanding relationship with members of the Founders Fund team.

Before joining OpenAI, Beiermeister held leadership roles at Meta and previously spent several years at Palantir, the data analytics company co-founded by Peter Thiel, who also established Founders Fund. Stephens likewise worked at Palantir during its early years, giving the pair a professional relationship that spans more than a decade.

Beiermeister said she intends to focus on backing startups developing AI infrastructure, agentic systems, defence technology, energy, climate technology, biotechnology and other highly technical industries. In a LinkedIn post announcing the move, she said the companies that would define the next two decades would emerge from sectors where engineering challenges are greatest. She invited founders building in those areas, especially those who do not fit the traditional startup mould, to get in touch.