Ryan Beiermeister has joined Founders Fund as a partner, he announced Monday. Beiermeister is well known in Silicon Valley for several reasons. For one thing, prior to this role, she spent about two years as VP of Product Policy at OpenAI, which became a household name shortly after ChatGPT became the fastest-growing app in history.

That career choice ended abruptly in February when she was reportedly fired after objecting to a planned ChatGPT feature called “adult mode,” which would allow adults to use the chatbot for erotic purposes. The Wall Street Journal reported that her firing involved an accusation of sex discrimination by a male colleague, although Beiermeister called any accusation that she discriminated against anyone “absolutely false.” In March, OpenAI reportedly scrapped plans for adult mode.

More recently, Beiermeister has become known in Silicon Valley for her slick strategy on a Founders Fund YouTube show called “Mafia.” The game is about discovering which players are secret mafia assassins before those players can “kill” the rest of the players.

Beiermeister played against OpenAI’s Sam Altman, Anduril’s Palmer Luckey, Figma’s Dylan Field, Flexport’s Ryan Petersen, Founders Fund’s Trae Stephens, and several others.

One of the most intense scenes in Episode One involved her and Altman each saying that if they were found dead, it would mean the other was the killer. Those who knew the story laughed.

Some commented on Twitter that maybe the whole Mafia game was really a job interview for her. The game, according to the company’s marketing director and game MC Mike Solana (who brought the game to the company), is often played at Founders Fund retreats.

However, it was not like that. “While she is an excellent mob player, that was not part of her interview process. She has been close with Trae Stephens since they worked together at Palantir and has been friendly with our team for years,” a Founders Fund spokesperson told TechCrunch.

Although the way Beiermeister played the game (coldly, making analytical observations and arguments about who the mafia could be) couldn’t have hurt his prospects.

Still, Beiermeister has known Trae Stephens for at least a decade. Prior to his role at OpenAI, and before that at Meta, he spent his formative years at Palantir, the big data company founded by the venture capital firm’s founder, Peter Thiel. Stephens also worked at Palantir in its early days.

Beiermeister says she’s most interested in backing the types of startups the Founders Fund is known to gravitate toward.

“The companies that will define the next twenty years are being built in the categories where product engineering is most difficult and the stakes are highest: AI infrastructure and agent systems, defense, energy, climate, biotech, the regulated frontier,” he wrote in a LinkedIn post. “To the founders of these domains, especially if you don’t fit the standard mold: I want to talk to you and my inbox is open.”