7Search.ccgreg brockman openaigreg brockman openaigreg brockman openai emailgreg brockman openai linkedingreg brockman openai educationopenai founder greg brockmantim brooks openai linkedinto the board of directors at openaiopenai planning for agi and beyondopenai ceo sam altman bloginterim ceo of openaiopenai announces leadership transitionoverview-openai