Twist Bioscience: Tracey Mullen, Nimisha Srivastava, Patrick Weiss

Twist Bioscience has promoted Tracey Mullen to senior VP of operations and Nimisha Srivastava to senior VP of R&D. Patrick Weiss will step down from his role as COO into a strategic advisor role for personal reasons, effective April 21, 2022. Twist Bioscience: Tracey Mullen, Nimisha Srivastava, Patrick Weiss

Mullen joined Twist through its acquisition of Abveris, where she was CEO. Prior to that, she served as Abveris' COO and on the antibody discovery team at Biogen. Mullen holds an MBA from the Quantic School of Business and Technology.

Srivastava built the core technology team at Twist, where she has worked since March 2014. Prior to Twist, she held technical and leadership roles at various startups and labs. She holds a PhD in chemical engineering from the University of Michigan.