Susan Crockin heads a private legal and consulting practice, and is a nationally recognized author and lecturer on the legal aspects of the reproductive technologies, reproductive genetics, embryo law and adoption. Beginning in 1988, she developed one of the first legal practice in the country devoted exclusively to the legal aspects of the assisted reproductive technologies (ARTs) and family building through adoption and collaborative reproduction. She represents medical ART programs and health institutions across the country, Massachusetts adoption agencies, and individual clients, including patients seeking to build their families through collaborative reproduction with gestational carriers, donor gametes or donor embryos. She has taught bioethics, is a frequent visiting professor on these issues, consults to consumer organizations, public commissions, legislatures and courts, and as a long-standing member of the ABA's Executive Committee on Reproductive Technologies and Genetics has worked on drafting that group's initial and ongoing model ART legislation..

Crockin has published two books, Adoption and Reproductive Technology Law in Massachusetts and Family Building Through Egg and Sperm Donation: Medical, Legal and Ethical Issues, as well as several chapters and articles, and for more than years has written "Legally Speaking," the national quarterly legal column she created to review court decisions in these unique areas of the law for the medical community.