A native of New York City, Mr. Tilney was educated at Columbia and Harvard Universities. As a photographer, he specializes in ten- to twenty-print portfolios on different themes, usually reworking the art and architecture from earlier periods and different cultures. He has been involved in photography for over 30 years, studying with Minor White, Arnold Gassan, Jerry Uelsmann, and Nick Johnson. Exhibitions of his work have been mounted in many galleries and universities, and he has published a number of photographic essays. His work is also in many private collections. In addition to his photography, Mr. Tilney is an economic development specialist, who has managed projects throughout the United States and around the world. Many of his photographs come from the countries and cultures where he worked. Mr. Tilney was a Managing Vice President of Abt Associates, Inc., a major U.S. consulting firm, and ran its International Economic Development Practice. He retired in 2004 in order to devote full-time attention to photography.