Since young age Dennis Osorio has traveled in Peru, at the beginning in road trips with the family mainly in routes to the Andes where the contact with the local culture and landscapes inspired him a close connection with nature, later he became a boy scouts leader in Peru, activity that share with his studies in tourism and spent some years training youth and adults in outdoor skills being a Wood Badge insignia recipient.

Until went to Spain to continue his studies, Dennis holds a Master´s Degree by the Universidad Politecnica de Valencia in Tourism and Hospitality,then he came back to Peru and start working in a Responsible Tourism and Fare Trade Project with Andean communities in Cusco, in 2005 moved to Machu Picchu to work as a head of naturalists of the hotel chain Inkaterra specializing in birding, Dennis had the chance to participate in a Safari Ranger Training Course in South Africa an amazing experience that expand his horizons in terms of hospitality service and outdoor experience.

In the following years he develops his career as a consultant in ecotourism with the NGO Inkaterra Association managing the interaction between projects of research, conservation and community development with ecotourism; also as an expedition leader in the Pacaya Samiria National Reserve, Cuba and Patagonia; has the chance to teach in a couple of Peruvian universities the courses of quality in tourism services and birdwatching, and provide training to park rangers and tour guides in different areas of Peru.

Dennis is representative of the Urban Bird Program (Programa de Aves Urbanas – PAU) in Lima, and recently named reviewer of the birding citizen science platform Ebird.org for Lima. On his free-time, enjoys birding, hiking, nature photography and monitoring backyard birds at home.