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President and Founder:
Dennis W. Bowman, Ph.D.

President and Founder Dr. Dennis BowmanDr. Bowman formed PSSG to provide an array of consulting and training services to public safety agencies in the United States. He is a retired captain from the Illinois State Police where he held various command positions such as Accreditation Manager, Community Policing, Research and Development, Staff Services, Drug Enforcement, and District Commander. He is a graduate of the FBI National Academy and held several leadership posts in the alumni organization, including Illinois state chapter president. He was selected as the Section III Representative at the FBI National Academy.

Dr. Bowman obtained both his doctorate and master's degrees from Southern Illinois University. His Ph.D. is in Education while his Master's is in Administration of Justice. Dr. Bowman served as adjunct faculty in the Administration of Justice department at SIU for several years. His undergraduate degree is in secondary education from Illinois State University. He is presently a professor in the School of Law Enforcement & Justice Administration at Western Illinois University, teaching in areas of policing, ethics, management, and criminal investigations to undergraduate and graduate students. Dr. Bowman once served as the Director of the Institute for Applied Criminal Justice Studies at WIU which is actively involved with the development of research, education and training initiatives for the criminal justice professions.

Dr. Bowman served as a Certified Assessor for the Commission on Accreditation for Law Enforcement Agencies (CALEA), and was selected by CALEA to serve on three Standards Review Task Forces in 1993, 1997, and then again in 2004. He was a task force member of the Federal Law Enforcement Training Accreditation program which is under the auspices of the Federal law Enforcement Training Center (FLETC) at Glynco, Georgia.

Dr. Bowman served for six years as a policy consultant with the Metropolitan Police Department in Washington, D.C. in the area of law enforcement policy. He has also consulted and trained for several agencies throughout the nation on numerous law enforcement topics and programs. He has published numerous articles on law enforcement policy, community policing, risk management, and has guest-lectured at the Institute for Police Technology and Management (IPTM) at Orlando, Florida in staff inspections and internal auditing. His international training experiences involve instruction in leadership assessment, police-media relations, critical incident management, community policing, and the American criminal justice system. He has trained in Afghanistan, China, Germany, Kazakhstan, and Russia. He is responsible for the development of a formal relationship between his university and East China University of Political Science and Law in Shanghai, China.

Executive Vice President:
Angela L. Wingo, Ph.D.

Executive Vice President Angela L. Wingo, Ph.D.

In Memoriam 1969 - 2016: you are greatly missed.

Dr. Wingo has over 10 years of progressive experience in the field of police psychology and teaching in the university and community college systems in the state of Illinois. She has a Ph.D. from Southern Illinois University (SIU) in Educational Psychology with a specialization in Counseling Education. Her Master’s degree is in Rehabilitation Counseling from SIU and Bachelor’s degree is in Psychology, also from SIU. Dr. Wingo has extensive experience in training and consulting public safety agencies nationwide. She has owned and operated a private practice since 1995.

Dr. Wingo’s counseling and training experiences in law enforcement include dealing with critical incident stress, motivational methods, critical decision making needs, and ethical behavior. She coordinates pre-employment psychological screenings, fitness for duty, special promotional assessments, and post-offer psychological screenings for law enforcement and public safety candidates. Her services also include career development counseling, training and assessments. She is also featured in two videos, Police Officer Stress and Stress Trauma, sold through

In addition to working with federal, state and local agencies in training and personnel related issues, Dr. Wingo instructs at Southern Illinois University at Edwardsville and Southwestern Illinois College in several psychology related courses. Her professional credentials include: Licensed Clinical Professional Counselor (Illinois); National Certified Clinical Forensics Counselor; National Certified Counselor; and Certified Assessor, Commission on Accreditation for Law Enforcement Agencies (CALEA).

Vladimir Sergevnin, Ph.D.
Assistant Professor
School of Law Enforcement & Justice Administration
Western Illinois University

Associate Vladimir Sergevnin, Ph.D.

Dr. Sergevnin serves as the Director, Center for Applied Criminal Justice in LEJA. He formerly worked as the Manager of Research for the Illinois Law Enforcement Training and Standards Board as Editor of the Law Enforcement Executive Forum. From 2003-2006 he served as the Director of the Illinois Police Corps at WIU. Dr. Sergevnin is a retired Colonel from the Russian police and several universities in Russia such as Vladimir Juridical Institute and Saint Petersburg University. He has twenty eight years of teaching experience in Russia and United States. Dr. Sergevnin has extensive experience in teaching various in-service topics and giving lectures at many different institutions.

Associate Professor
Western Illinois University
School of Law Enforcement and Justice Administration
Stipes Hall 403I
1 University Circle
Macomb, Illinois 61455
Barry S. McCrary, Ed.D.

Barry S. McCrary, Ed.D.

Barry S. McCrary, Ed.D. Has more than 30 years of experience in the field of juvenile justice, as well as more than 27 years of experience in training and academics. Dr. McCrary is currently an associate professor at Western Illinois University and was a professor at the University of Phoenix teaching policy issues in criminal justice. He worked for Allegheny County Juvenile Court, Community Intensive Supervision Program in Pittsburgh for 18 years, where he was responsible for counseling, designing, implementing, and monitoring a progressive treatment program. Dr. McCrary founded Maleness to Manhood, Inc., a nonprofit mentoring program for inner-city youth. He also worked as a counselor, consultant, therapist, and crisis intervention specialist for various organizations, including as a youth development aid at a Pennsylvania youth development center with violent juvenile offenders. He has experience in social science, administration of justice, and educational leadership. His relevant project experience includes corrections administration and management, corrections research, and for 18 years, he supervised a community intensive supervision program and supervised correction and probation workers within community corrections setting and provided 3-day workshops quarterly for the officers and community monitors. His corrections-based staff development and in-service trainings addressed a variety of topics, including restorative justice, supervisory roles and responsibilities, drug and alcohol education and assessments, group facilitation, staff effectiveness, family assessment, gang intervention, parent effectiveness, community organization, and the development perspective of criminal behavior. Dr. McCrary earned his doctorate in Education from Duquesne University, his master of science in Administration of Justice from Shippensburg University, Pennsylvania, and his bachelor of science in Human Resource Management from Geneva College, Pennsylvania.


Debra Brown

Debra Brown is a retired Captain from the Sangamon County Sheriff's Office in Springfield, Illinois. Debra served 32 years at the Sheriff's Office, starting as a telecommunicator and retiring as Captain of the Operations Division. Throughout her thirty-two years with the Sheriff's Office she worked all three patrol shifts as a deputy, sergeant, and lieutenant. She also was a D.A.R.E. Officer, supervised the Crime Prevention Division, coordinated the College Intern program, worked in the Office of Professional Standards and oversaw the Operations Division the final two yhears at the Sheriff's Office. Throughout her career she instructed Recruit Classes at the Illinois State Police Training Academy.

Debra received an Associate's Degree from Southern Illinois University Carbondale, and a Bachelor's and Master's Degree from Western Illinois University in the School of Law Enforcement & Justice Administration. She is a 2001 graduate of the Northwestern University School of Police Staff and Command. Debra is currently an Associate Professor at the University of Illinois at Springfield in the Criminology and Criminal Justic Department. In addition she works as security detail at the Illinois House of Representatives when they are in Session. She currently holds the office Secretary for the Fraternal Order of Police Lodge 55.

Jeremy Jewel

Jeremy D. Jewell is a Professor and a full-time psychology faculty member. He obtained his Ph.D. in psychology with a specialization in school psychology from the University of Texas at Austin. Dr. Jewell completed a one-year internship with the Nebraska Internship Consortium in Professional Psychology, and was placed at Father Flanagan's Boy's Home in Omaha, Nebraska. This internship training was within the inpatient treatment facility for children and adolescents, and focused on consultation with schools, foster families, and administration, individual and family therapy, psychoeducational and psychological assessment, and research.

Dr. Jewel has provided psychological services and conducted psychological examinations for PSSG for many years.

Dr. Jewell has also worked in a number of related fields prior to his appointment at SIUE. Previously, Dr. Jewell was a school psychologist for the Austin Independent School District in Austin, Texas for two years. He has also worked for a number of years as a social worker, child abuse and neglect investigator, and supervisor in a state hospital for the mentally retarded. Much of this previous work has been with ethnic minority populations as well as those in poverty.

Dr. Jewell's previous and current research has focused on two primary areas. The first research area concerns the etiology, diagnosis, and treatment of youth diagnosed with Conduct Disorder. The second research interest is in the effects of the family environment, parenting style, and discipline practices on children's mental health and the development of psychopathology. Dr. Jewell is currently involved in a research project that examines the effects of parent and teacher discipline incongruity and children's behavior in the home and classroom. He is also in the process of designing two questionnaires, one which would measure the family environment while the other would measure teachers' discipline styles.

Dr. Jewell teaches courses in adolescent psychology, cognitive assessment of children and adolescents, therapy with youth and families, consultation, and crisis intervention. Dr. Jewell also supervises research projects, serves as an academic advisor, directs thesis research, and assists in program development. He is also a member of the American Psychological Association, Illinois Psychological Association, and the Illinois School Psychologists Association.


Portia Y. Swinson

Portia Yvonne Swinson is a retired member of the Washington, D.C. Metropolitan Police Department. During her twenty-five years on the Department she worked in several police districts in the patrol section as an officer, sergeant and lieutenant. The last five years of her career she was assigned to the Planning and Research Division in charge of the Accreditation Unit.

Upon her retirement she worked for a year and a half with the National Organization of Black Law Enforcement Executives as the office manager.

She joined the Georgetown University’s Department of Public Safety May 1, 2000 as the Accreditation and Training Manager. Her first assignment was to single-handedly prepare the Department for a Commission on Accreditation for Law Enforcement Agencies (CALEA) on-site assessment, held five months later in October 2000. It should be noted that this process normally takes a staff of at least four individuals a year of intense preparation. Since that initial 2000 CALEA on-site, she succeeded in leading the Department through a second on-site, held in April 2002, again unassisted. For these accomplishments she was given an Outstanding Individual Achievement Award on May 3, 2002. Ms. Swinson was promoted to the rank of Assistant Director and was responsible for Accreditation, Training and the Communication Section.

Ms. Swinson has served for more than twenty years as a Certified Assessor for the Commission on Accreditation for Law Enforcement Agencies (CALEA). She has conducted numerous on-site assessments for various law enforcement agencies, to include colleges, universities, and state and sheriffs police departments.

Karen L. Sears, Ph.D.

Associate Karen L. Sears, Ph.D.

Dr. Karen L. Sears earned a Ph.D. in the field of industrial-organizational psychology from the University of Illinois, Urbana-Champaign, with minors in social psychology and quantitative methods. She is a Professor of Psychology and Department Chair at Western Illinois University. In her role as department head, she has administrative experience in overseeing departmental objectives, recruiting and evaluating personnel, administering operating budgets, and furnishing leadership for strengthening teaching and scholarship among members of the department. Dr. Sears has taught courses for more than 20 years ranging in subject matter, such as statistics and research methods; industrial-organizational psychology; women and work; fair employment law; and conflict resolution. Her research interests include examination of factors influencing counterproductive work behaviors, such as bullying, sexual harassment, and workplace incivility. An additional leadership role held by Dr. Sears was union president of a university-based chapter; she served for 6 years as president of that organization, negotiating and enforcing a labor contract on behalf of 750 faculty and administrative support professionals. Dr. Sears is a member of the Society for Industrial and Organizational Psychology and the Association for Psychological Science.

Dr. Sears's training and background qualify her to assist with a range of human resource issues and function, such as: job analysis, job design, competency modeling; union issues, labor relations, equal employment opportunity policies; performance management; training, professional development; work-family balance; groups, teams; motivation, job attitudes, and engagement surveys; inclusion, diversity; leadership development; and mentoring, socialization, onboarding.


© 2002
The Public Safety Specialist's Group
P. O. Box 7232
Springfield, Illinois 62791.