In 2009, von Maltzahn joined
Flagship Pioneering, a Cambridge, Massachusetts-based venture capital firm investing in life sciences biotechnology, and sustainability startups. In his first few years at Flagship, von Maltzahn helped launch several such companies, including Seres Therapeutics and
Indigo Agriculture. He served as
chief technology officer at Seres when the company developed SER-109, one of the first microbiome therapeutics. In 2018, von Maltzahn cofounded two biotechnology startups, Generate Biomedicines and Tessera Therapeutics. Two years later he became a general partner at Flagship. In 2023, von Maltzahn and another Flagship partner, Jacob Rubens, co-founded Quotient Therapeutics, a biotechnology startup with offices in both Massachusetts and the UK. Quotient uses genome sequencing technology to develop medication for diseases caused by somatic mutations. ==References==