[2] After graduating high school at 17, Greenberg traveled the country working odd jobs, including cooking at a nursing home and bartending.

[5] During the 25 years he worked for AIG, Greenberg held a number of senior management positions.

[4] Greenberg was named president and COO in 1997 and was considered the heir apparent to take over as CEO of AIG.

[9] Shortly prior to the deal, he broke his ankle in a horse riding accident, and he worked on the merger while recovering.

[14] In 2021, he led the company's acquisition of Cigna Group's Asian businesses that focused on health and accident insurance.

[13] In 2023, Greenberg's total compensation from Chubb was $27.7 million, representing a CEO-to-median worker pay ratio of 452-to-1.

[22] He testified at a July 2021 hearing of the U.S. Senate Committee on Banking, Housing and Urban Affairs, to advocate for such a program.

[14][25] In March 2024, Greenberg defended Chubb's decision to provide former President Donald Trump a $91.6 million appeal bond for the civil case E. Jean Carroll v. Donald J. Trump in a letter to Chubb investors claiming the company doesn't "take sides.