Paul Graham, Jessica Livingston, Robert Morris and Trevor Blackwell. In 2010, Kirsty Nathoo joined as an accountant and became CFO in 2012. In early 2010, Harj Taggar joined as an advisor. In September 2010, Alexis Ohanian joined. In November 2010, Paul Buchheit and Harj Taggar were named partners. In 2015, Taggar left YC. Taggar returned to YC in 2020 as a group partner. In January 2011, Garry Tan joined YC, first as designer-in-residence and later as partner. He left YC in November 2015. Later in 2011, Aaron Iba joined as a partner. In February 2014, Sam Altman became president of Y Combinator. Michael Seibel joined Y Combinator as part-time partner in January 2013 and later became a full-time Partner in 2014. The company includes managing directors, group partners, visiting group partners and team members as listed on its website. In 2018, Y Combinator announced that Lu Qi, a former CEO of Baidu and Bing, would join the company as CEO of YC China. Y Combinator announced that Lu left YC in November 2019 and that it had decided not to pursue a program in China. In March 2019, Y Combinator announced its president Sam Altman would be transitioning into a Chairman position to focus more on OpenAI and Geoff Ralston would be the new president. In January 2022, Garry Tan returned to YC as president and CEO. Controversies Y Combinator has been blamed for its encouragement of the ageism culture in Silicon Valley. Paul Graham said in 2005 that people over 38 lacked the energy to launch startups. It was also at a Y Combinator event, the 2007 Startup School, that Mark Zuckerberg said, "Young people are just smarter". Research on this issue published by Harvard Business Review found Y Combinator's views to be misguided, as the average age of a successful startup founder was found to be 45 years old. Open Research project The Human Advancement Research Community (HARC) project was set up with the "mission to ensure human wisdom exceeds human power". The project was inspired by a conversation between Sam Altman and Alan Kay. Its projects include modelling, visualizing and teaching software, as well as programming languages. Members included Alan Kay, Bret Victor, and Vi Hart. Patrick Scaglia was chair of HARC and was listed as an advisor in 2017. YC Research disaffiliated with Y Combinator and now operates as Open Research. See also Hacker News List