As principal of Andrew T. Der & Associates, LLC, he works and writes for land development companies and government agencies requiring technical and scientific guidance in the environmental disciplines. Concurrently, his expertise has expanded into environmental and travel journalism as an opportunity to establish a successful published story-base. In addition to nature and conservation tourism topics, his primary destination interests are creative and cultural family destinations, unique resorts, eco-travel, and the occasional offbeat experience. He is a regular freelance contributor to various publications and also a columnist at Elliott.org .