Mark S. Carich, PhD, is coordinator of the Sexually Dangerous Persons Program with Illinois Corrections at Big Muddy River Correctional Center. He is currently Adjunct Professor in the Counseling Department at Lindenwood University, and was affiliated with the Adler School of Professional Psychology. He has written extensively on issues relating to the management of sex offenders.

Martin C. Clader, MA, CSQW, managed child protection and domestic abuse services in the City of Salford before he established Calder Training and Consultancy to further develop front-line assessment frameworks and practice.