You can register to speak or indicate your support or opposition to this and other bills, or contact legislators through the Legislature's web site. Options are listed at http://www.azleg.gov/alisStaticPages/FAQ.asp
Elimination of licensing of geologists would likely result in geologists having to get engineers to sign off on their reports to clients and agencies.
A message sent out by the Board on Technical Registration noted the bill also moves them into the AZ Dept. of Administration, with unknown consequences:
ALERT**HB2613 Proposes to Deregulate Geologists and Landscape Architects. It also proposes moving the Board into the Arizona Department of Administration, the ramifications of which are unknown at this time. Please review the Bill; it may be heard in the House Commerce Committee as early as February 17, 2016 at 9:30 am. http://www.azleg.gov/legtext/52leg/2r/bills/hb2613p.pdf. Please look at sections 12, 13, 14, 15, 16, 17, 18, 19, 20, and Section 56, 57, 58. You can find your legislators' contact information at http://azredistricting.org/districtlocator/. You can contact the Governor http://azgovernor.gov/governor/form/contact-governor-ducey.