Gelest Inc.: appointed John Sobchak to the newly-created position of chief financial officer. Sobchak joins Gelest from active pharmaceutical ingredient manufacturer AMPAC Fine Chemicals, where he served as CFO for the past four years and helped oversee its strategic transformation and subsequent sale to SK Holdings. Earlier in his career, Sobchak served as CFO of KMG Chemicals for more than 12 years, during which time he helped guide the company’s transition to a leader in wet process chemicals...