Tim Deignan is a geophysicist at Shaw Environmental & Infrastructure Group beginning in November 2009. Previously, he was the Discipline Lead for geophysics at Tetra Tech EC, Inc. in Lakewood, Colorado, where he worked from 1988 to 2009 in the environmental geophysical field. He is routinely involved in survey planning, data acquisition, processing, and analysis and interpretation of geophysical data, as well as the development of sensor and positioning systems and platforms. In performing and managing geophysical surveys for MEC projects since 1994, he has been provided the unique opportunity to interact with client, regulatory, and industry personnel in the continued development of the optimum quality processes' for MEC projects. Tim has been a member of the ITRC UXO team since 2003/2004, and has provided input for several ITRC guidance documents. He has also been an invited speaker for the SERDP/ESTCP conferences, as well as the bi-annual UXO Forum. Tim earned a bachelor's degree in geophysical engineering from the Colorado School of Mines in Golden, Colorado in 1988 and is also a registered Professional Geophysicist in the state of California.