Beth Seidenberg is a board-certified physician and immunologist who helped develop major drugs like Singulair at NIH and large pharma companies before becoming a venture investor, giving her rare hands-on drug development experience among VCs. She simultaneously serves as founding managing director of Westlake Village BioPartners and general partner at Kleiner Perkins while being recognized as a key architect of the Los Angeles biotech ecosystem, frequently stepping in as founding board member and chair to help shape clinical strategy at multiple therapeutics companies.