Maynor qualified as a civil engineer but left his profession to concentrate on birdwatching. A passionate naturalist, his interest started when a scholarship to the American School of Guatemala encouraged him to participate in the National Biology Olympiad. His subsequent interest in birds developed while working on environmental impact assessments in professional practice. Maynor worked with the Guatemalan Tourism Board to design routes that show the richness and diversity of the country’s birdlife to visitors, is currently the National Audubon Society’s instructor on the Training Course for Birding Guides – Basic Level, and has participated in bird counts at Lake Atitlán, Tikal, and Antigua since 2007. Maynor has travelled throughout Guatemala as a birding guide and, while not on tour, is always on the lookout for new birding destinations. He has the first record for Guatemala of a southern lapwing (Vanellus chilensis).