Radiant Vision Systems, a provider of imaging systems for scientific evaluation of light sources and displays, has appointed Stone Jiang as its CEO, succeeding the recently retired Doug Kreysar. During his 12 years with Radiant, Jiang’s responsibilities have consisted of strategic planning, business development, sales, and support for Radiant's customers worldwide. He most recently served as Radiant’s executive vice president and general manager of China and has previous experience as general manager of Orbis and Keithley Instrument Inc. Kreysar will continue to serve the company in a senior advisor role. Stone Jiang. Courtesy of Radiant Vision Systems. MOUNTAIN VIEW, Calif. — Photonic supercomputing company Lightmatter has added Simona Jankowski as its CFO. Jankowski joins Lightmatter from NVIDIA, where she was vice president of investor relations and strategic finance. Prior to NVIDIA, she served as a managing director at Goldman Sachs, where she led equity research for the hardware and communications technology sectors and managed the company’s global investment research office in San Francisco. Alain de Wolff. Courtesy of TiniFiber. LINDENHURST, N.Y. — TiniFiber, a manufacturer of optical cabling solutions, has appointed Alain de Wolff as its managing director for global sales and business development. In this role, he will lead business development in Europe, South America, Africa, and the Asia-Pacific region. Prior to joining TiniFiber, de Wolff served in senior roles at Gilat Satellite Networks, AMOS-Spacecom, and Mer Telecom. Elke Arenholz. Courtesy of Andrea Starr/Pacific Northwest National Laboratory. UPTON, N.Y. — Elke Arenholz has been named director of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science user facility at DOE’s Brookhaven National Laboratory, effective August 2024. Arenholz has held senior leadership positions at the DOE's Pacific Northwest Laboratory, Oak Ridge National Laboratory, Cornell High Energy Synchrotron Source, and the Advanced Light Source at Lawrence Berkeley National Laboratory. ST. PETERSBURG, Fla. — VIGO Photonics, a developer of edge IR detectors, has added to its Vigo Photonics USA team. The company named Daniel Hirsh and Merry Ann Libonate as directors of sales for industrial gas sensing and security and defense, respectively. Hirsh previously served as a regional sales manager for Teledyne Gas and Flame Detection, and Libonate joins from JENOPTIK where she served as sales director, industrial solution. Vigo also added Robert Myers as senior applications engineer. Prior to joining Vigo, Myers served as product manager for LightPath Technologies. GHENT, Belgium — Medical diagnostic company Axithra has appointed Alain Pluquet as chairman of the board and Michael Tillmann as an independent director. Pluquet's background includes twelve years with the Mérieux group in positions including corporate vice president, CTO, chief data officer, and president of subsidiaries. Tillmann has founded multiple companies in the healthcare industry and has thirty years of experience in senior executive and board positions at companies such as Roche Diagnostics, where he was president and CEO. David Ryzhik. Courtesy of Axcelis Technologies, Inc. BEVERLY, Mass. — Axcelis Technologies, Inc., a supplier of enabling ion implantation solutions for the semiconductor industry, has named David Ryzhik as senior vice president of investor relations. Ryzhik has more than 20 years of investor relations and financial experience across multiple industries, most recently serving as vice president of investor relations at MKS Instruments. Axcelis has also announced the retirement of Doug Lawson, executive vice president of corporate marketing and strategy. Lawson plans to remain with the company as a senior advisor through July 2025. Bret DiMarco. Courtesy of Agilent Technologies. SANTA CLARA, Calif. — Analytical and clinical laboratory technologies company Agilent Technologies has added Bret DiMarco as its chief legal officer and senior vice president. Most recently, DiMarco served as chief legal officer of Pendo.io, a venture-backed software-as-a-service company. Before joining Pendo.io, he was executive vice president, chief legal officer, and corporate secretary for Coherent Inc. Currently DiMarco serves as chair of the Nasdaq Exchange Nominating Committee, and has been an adjunct assistant professor of law at the University of California Law School, San Francisco since 2004.