Zuhl has been with the company since 2011, as corporate controller and also as interim CFO.
Otterberg had been interim CFO since mid-August.
Malson has been at the company for eight years, seven as CFO.
Cal Hoagland, a principal at FLG Partners, has been named interim CFO. NeoPhotonics has hired an executive-search firm to find a permanent successor.
McCarthy was promoted from the position of VP of Finance after Ralph J. Nicoletti resigned as CFO.
Rosenthal will handle investor relations and human resources, as well as traditional CFO functions. He was director and interim president and CEO at Cyanotech.