Craig is a professional wetland scientist with more than 31 years of experience in the environmental science field as a consultant to industry and government. His multifaceted background includes jurisdictional wetland delineations, uniform wetland mitigation assessment method (UMAM) assessments, formal wetland verifications, environmental resource permitting, agency coordination, permit compliance, listed species surveys and permitting, vegetative identification and monitoring, Geographic Information System (GIS) mapping, and land survey.

He is trained as a wildland firefighter and certified commercial, natural areas, and aquatic herbicide applicator. As the lead field biologist on many projects, his responsibilities have included extensive data collection and coordinating field surveys for threatened and endangered species, such as the Florida scrub jay, gopher tortoise, sand skink, eastern indigo snake, and various protected plants. Additional activities include the assessment of nuisance and exotic vegetative species for their environmental impacts, implementing control procedures, and directing the establishment of vegetative and aquatic monitoring programs.