District of ColumbiaGeologist License Requirements

Professional geologists must hold a minimum of a bachelor's degree in geology, geological engineering, geophysics, or a closely related geoscience field from an accredited institution. A graduate degree may reduce the professional experience requirement by one to two years in most states.

Most states require 3-5 years of professional geological experience working under the supervision of a licensed Professional Geologist. Qualifying experience includes geological mapping, environmental site assessments, hydrogeological studies, geotechnical investigations, and mineral exploration. A graduate degree may substitute for 1-2 years of experience.

Approximately 33 states require licensure for professional geologists. States that do not require licensure include Alaska, Colorado, Connecticut, Hawaii, Iowa, Louisiana, Maryland, Massachusetts, Michigan, Nevada, New York, Rhode Island, South Dakota, Vermont, and West Virginia. Even in non-licensing states, ASBOG certification may be required by employers or for government contracts.

Professional geologists practice in areas including environmental site assessment, hydrogeology and groundwater studies, engineering geology, mining and mineral resource evaluation, geotechnical investigations, and geological hazard assessment. Some states offer specialty certifications in engineering geology or hydrogeology.

Most states that license geologists offer comity or endorsement for PG-licensed geologists from other states. Requirements typically include verification of current PG license, passage of both ASBOG exams, meeting education and experience requirements, and completing a background check. Some states may require a state-specific exam.