Dan Martin is a Physical Scientist with the National Geodetic Survey and is the NGS Geodetic Advisor for the State of Vermont. He holds an Associates Degree in Civil Engineering Technology from Vermont Technical College. From 1987-2003 he held various positions with the Vermont Agency of Transportation, beginning as Assistant Resident Engineer in 1987, and working as the Geodetic Program Supervisor from 1998-2003. In 1992 he was on Special assignment to National Geodetic Survey field office during Northeast High Accuracy Reference Network campaign. His professional associations include the American Congress on Surveying and Mapping (ACSM), American Association for Geodetic Surveying (AAGS), Vermont Society of Land Surveyors (VSLS), Civil GPS Service Interface Committee. He is Chair of GIS/LIS and the Vermont Geodetic Network Committees and a member of Continuously Operating Reference Station (CORS) Committee. He received Meritorious Service Awards from the Vermont Agency of Transportation in 1997, 2001, and 2002, and their Employee of the Year Awards in 1998 and 2001. In 2002 he received a National Geodetic Survey Partner Award. Martin was the author of the “GPS Basics” column in Professional Surveyor. He has written for the Vermont newsletter Cornerpost, and has published a number of papers for ACSM publications.