Who We Are

Our team includes a diverse array of publishing and instructional design professionals with decades of experience.

Doug Seibold, president, has worked for 30 years in trade, educational, and nonprofit publishing and media. From 1999 to 2002, he was founding editorial director of UNext, which created online schools in partnership with universities such as Stanford, Columbia, and the University of Chicago. He founded Agate in 2003, started Agate Development in 2005, acquired Surrey Books in 2006, and created the Agate Digital and Midway Books imprints in 2012.

Kate DeVivo, vice president of editorial development, has 18 years of experience working in editorial, production, and management for publishing companies, higher education organizations, and nonprofit associations. She holds two journalism degrees and has edited books, magazines, journals, and educational materials. She has extensive experience assembling and leading teams to develop print and electronic products, educational ancillaries, online courses, and K–12 assessment materials. She joined Agate in 2010.

Kristine McIntosh, chief of learning design and technology, has worked in education and training for 19 years. She began her career as a secondary mathematics teacher and moved on to adult education and technical training after receiving her MS in educational human resource development. Her experience includes creating online, asynchronous corporate training for companies like Accenture and McDonald’s; implementing communication and change management for associations like the Precast/Prestressed Concrete Institute and the Gas Technology Institute; and creating higher-education lesson plans and designing courses for educational publishers and universities. She joined Agate in 2010.

Suzanne Sonnier, director of editorial development, is a former middle and high school teacher (English/Language Arts and social studies) and university and community college instructor (American history and Western civilization), and holds a MA in history. She is the author of Shinto, Spirits, and Shrines: Religion in Japan and has developed many K–12 and college textbooks and standardized assessments. She joined Agate in 2011.   

Sarah Wood, director of editorial development, worked for McGraw-Hill Higher Education for twelve years, honing her content development skills across a variety of disciplines, including accounting, computer information technology, public safety, electricity and electronics, student success, programming, and general education. She joined Agate in 2012.