His development, evaluation and training efforts have focused primarily on enhancing the Prosocial skills proficiency of aggressive adolescents and younger children in school, residential facility, agency and community settings. Reflecting his role as director of the Syracuse University Center for Research on Aggression, much of his research and teaching have centered on helping youngsters replace antisocial, aggressive behaviors with constructive, alternative means of seeking life satisfaction and effectiveness. As his early evaluation research increasingly indicated that many youth do learn but fail to transfer or maintain such newly learned Prosocial skills proficiency, his research came more and more to focus on the development and evaluation of diverse procedures for increasing the likelihood that such setting and temporal generalization of gain-to the school, the street, the home, the community-would in fact become more likely to occur-a major research interest of his which continues. Dr. Goldstein was professor emeritus of education and psychology at Syracuse University; ex-director of the New York State Task Force on Juvenile Gangs; member of the American Psychological Association Commission on Youth Violence; member of the Council of Representatives, International Society for Research on Aggression; associate editor of the journal Aggressive Behavior and recipient of the Award of Excellence (1990), Juvenile Justice Trainer's Association; the Blackburn Award for Significant Contributions (1991) from the National Association of Juvenile Correctional Agencies; the U.S. Office of Juvenile Justice and Delinquency Prevention's (1994) Model Program Award for The Prosocial Gang Project; the American Psychological Association's Committee on Children, Youth, and Families' (1996) Outstanding Career Contribution Award; and the 1996 Senior Scientist Award from the School Psychology Division of the American Psychological Association.

Currently he is the Executive Director of Perseus House, a non-profit, designed to provide preventative and intervention services to children ages birth - 18. He also maintains a clinical practice that focuses on adolescent disorders and familial conflict. Mark serves in various community capacities in Pennsylvania and nationally, including board affiliation with Community House for Women, and previously with Children and Adults with Attention Deficit Disorder (CHADD). He also possesses certification through the Pennsylvania Chemical Abuse Certification Board (PCACB), as a Certified Addictions Counselor and a Certified Clinical Supervisor, and The National Association of Forensic Counseling. Mark's work has focused on the delivery of services to troubled and troubling young people and families in an effort to improve their quality of life.

A follow-up sequence is available for those schools, school districts, agencies, and facilities that participate in the initial training workshop and wish a follow-up supervisory opportunity. This opportunity is designed to be a problem solving, troubleshooting practicum experience for those teachers, change-agents, facility staff or others, who are about to or have actually begun leading Skillstreaming, Aggression Replacement Training or Prepare Curriculum groups. Its goals are to solve group leadership problems, which have occurred or might occur; answer specific trainer questions; practice needed trainer leadership skills and, in general, assist trainers in their efforts to establish and conduct effective and well-managed trainee groups. Emphasis in this consultation is on actual or anticipated challenges, difficulties, or questions from participants. Specific matters addressed in past supervisory workshops have included such topics as: