At Chelsea Green Publishing, which was acquired by Rizzoli International Publications in April:
Matthew Derr has been appointed deputy publisher. For the past three years, he has been a freelance editor for the company and served on its board of directors. He earlier led several colleges and was on the boards of several not-for-profit organizations.
Sean Maher has been promoted director of North American sales, marketing, and publicity. He was formerly director of marketing and sales analytics. Before joining the company, he spent 13 years at Da Capo Press, holding multiple positions in the marketing and publicity departments.