TOPTICA Photonics has appointed Holger Quast as senior director of biophotonics and materials. Quast will take over the strategic and operational management of TOPTICA’s biophotonics and microscopy and test and measurement divisions. Quast previously served as managing director of SynView GmbH. Since 2013, Quast worked for Siemens as venture director of the Siemens Technology Accelerator in the area of technology transfer and startup building.