Nicoletti-Flater Associates, PLLP
Specialists in Police and Public Safety Psychology, Crisis Intervention, Trauma Recovery, and Violence Prevention
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 John Nicoletti, Ph.D., ABPP
Contact Info: Phone: 303-989-1617     Email:
Dr. John Nicoletti received his Ph.D. in Counseling Psychology from Colorado State University in 1972. He co-founded Nicoletti-Flater Associates with his wife, Lottie Flater, in 1976. He has since established himself as a national expert in police psychology, violence risk assessment, workplace and school violence prevention, as well as crisis intervention and trauma recovery. Dr. Nicoletti has been asked to take part in several high profile investigations, including the Columbine High School and the Virginia Tech shootings.
More than 250 national corporations, government agencies, law enforcement agencies, schools, and religious institutions at the local, national, and international levels, have chosen to work with Dr. Nicoletti. Since 1996, Dr. Nicoletti and staff have provided on-site psychological screenings and consultations at the U.S. bases of McMurdo and the South Pole in Antarctica. Also included in his list of clients are: the National Recognizance Office, NASA, Lockheed Martin, and Colorado School Districts. Clients have the opportunity to work directly with Dr. Nicoletti and his staff of 12 through workshops, training seminars, and consultations. Dr. Nicoletti has also co-authored several books related to violence prevention, including: Violence Goes to Work, Violence Goes to School, and Violence Goes to College. His second edition of Violence Goes to College was published in 2010.
Throughout his career, Dr. Nicoletti has been an invited speaker at numerous national conferences on violence. He was a guest speaker for the National Association of Attorney Generals. In addition, Dr. Nicoletti has been honored with many awards for his contributions to the field of psychology. He is a recent recipient of the Antarctic Service Medal from the National Science Foundation. Dr. Nicoletti is a past Chair of the Psychology Section of the International Association of the Chiefs of Police. He has also been appointed to the Colorado Governor’s Commission on Expert Emergency Response as well as the Governor’s Juvenile Clemency Board. Dr. Nicoletti is also currently a member of NASA’s team for developing analog’s for training astronauts for long duration missions, such as the Mars Mission.


 Lottie Flater, LCSW
Lottie Flater specializes in the areas of police psychological services, workplace violence, school place violence and trauma interventions. She has presented at and received specialized training from the FBI. Among her accomplishments, Lottie has provided onsite consultation and debriefings for individuals who have been deployed to McMurdo Bay and the South Pole Station in Antarctica. She co-authored the book Violence Goes to Work: An Employer's Guide. Ms. Flater works with many state and federal law enforcement agencies, school systems, financial institutions, private corporations, and airline industry leaders. She worked in the school system as a Special Education Director, providing a variety of psychological services, and she was called in to help with trauma recovery for law enforcement personnel, students, and parents after the Columbine High School shooting in Littleton, Colorado. Ms. Flater has provided training and consultation to schools and businesses across the country in order to help prevent violence.


Psychological Services Staff

 Evan Axelrod, Psy.D.,ABPP, B.C.E.T.S.
Dr. Evan Axelrod received his Doctorate in Clinical Psychology, with an emphasis in Behavioral Forensics, from the University of Denver.  He has been a staff member of Nicoletti-Flater Associates since June 2000 and is a Board Certified Specialist in Police and Public Safety Psychology and a Board Certified Expert in Traumatic Stress. Dr. Axelrod previously worked in areas of emergency response and crime prevention.  He is an experienced provider of therapeutic services to children, adolescents, couples, families, and individual adults.  In addition to providing general counseling services, in both inpatient and outpatient settings, Dr. Axelrod specializes in pre-employment screening, fitness-for-duty evaluation, and direct and indirect threat/risk assessments.  Dr. Axelrod also provides training and therapeutic services in the areas of crisis and trauma intervention and debriefing, anger management, stress management, high-risk relationships, conflict resolution, peak performance, verbal communication, managing special populations, parenting, suicide/suicide-by-cop, peer support, and workplace and school violence.  Dr. Axelrod is an adjunct faculty member at the University of Denver, Graduate School of Professional Psychology.  He has contributed to several articles and books in the area of Violence and Police Psychology, and is the author of the book "Violence Goes to the Internet: Avoiding the Snare of the Net."


Mariya Dvoskina, Psy.D. 

Mariya received her Doctorate in Clinical Psychology, with an emphasis in Forensic Psychology from the University of Denver in 2016. Mariya has clinical experience and training in forensic, police and correctional psychology, violence risk assessment, psychological assessment, trauma, and crisis intervention. Mariya has worked with clients presenting with a variety of presenting problems (including substance abuse, psychotic disorders, PTSD and other trauma related disorders, and personality disorders).


 Robin Eskey, Psy.D.
Dr. Robin Eskey received her Doctorate in Clinical Psychology, with an emphasis in forensic psychology, from the University of Denver. She has been a staff member of Nicoletti-Flater since 2001. Dr. Eskey specializes in individual and couples therapy, and provides services in the areas of trauma, grief, and critical incident debriefings. In addition, she has provided training in anger management, stress management, suicide/suicide-by-cop, workplace and schoolplace violence. Dr. Eskey also holds a Masters degree in Clinical Psychology and a Masters in International Management. She has served as adjunct faculty at the University of Denver, teaching clinical interviewing and psychotherapy skills, for the Graduate School of Professional Psychology.


 Anne Field, LCSW
Anne first joined NFA as an intern in 1995 while in the process of finishing her Bachelor of Science degree from Metropolitan State College of Denver. Anne completed the Human Services Professional program and graduated Summa Cum Laude. She went on to receive a Masters in Social Work degree in 1998 from the University of Houston Graduate School of Social Work. She focused on mental illness/health and psychotherapy. In 1997-1998, Anne interned then worked for The Baylor Psychiatry Clinic within the Baylor College of Medicine in Houston, Texas.  After that year, she transferred into the Harris County Hospital District, and worked as a psychiatric and medical social worker and psychotherapist.  While there, she developed a new program for the Ben Taub General Hospital's outpatient psychiatric clinic.  She conducted groups and provided psychotherapy for adults with medical and psychiatric disorders.  She was licensed in the state of Texas in 1998 and in Colorado in 2000 as a Licensed Clinical Social Worker.  In November 2012, Anne also became a Certified Grief Recovery Specialist. 

Re-joining NFA in 2000, Anne has provided individual and couples psychotherapy to adult patients. Her areas of treatment and study are depressive and anxiety disorders, grief intervention and management, eating disorders, stress and anger management, trauma, crisis intervention, critical incident stress debriefing, and interpersonal and couples relationships. She participates in crisis consultations and interventions when needed and has taught police officers participating in the Peer Support seminars.  Anne is a member of the Association of Threat Assessment Professionals and Colorado Counseling Association.  She also sits on the Mental Health Advocacy Committee within the Evergreen Club of Rotary International.  

Shawn Knadler, Psy.D.
Shawn Knadler received his Masters degree in Forensic Psychology from the University of Denver's Graduate School of Professional Psychology.  He graduated from GSPP with his Doctorate in Clinical Psychology in 2013.  He has received specialized training in the areas of trauma, psychological assessment, and veteran issues. Shawn has experience working with adolescents and adults in both inpatient and outpatient settings. He also has clinical experience working with active duty military personnel at Buckley AFB, and military veterans at the Denver VA Medical Center.  Prior to earning his degree, Shawn served eight and a half years in the United States Army including combat tours in support of Operation Enduring Freedom.  During his military career, he completed a variety of advanced military training and leadership schools and was awarded several military commendations.  Shawn first began his work with Nicoletti-Flater Associates while completing a clinical practicum in 2008.

Katherine McMann, Psy.D. 
Dr. Katherine McMann received her Doctorate of Psychology in Clinical Psychology from the University of Denver, specializing in behavioral forensics and psychological assessment. She also received her Masters of Art in Forensic Psychology from the University of Denver. Dr. McMann has received specialized training in the areas of violence, trauma, psychological and forensic assessment, correctional psychology, and child/adolescent issues from working in both inpatient and outpatient facilities, as well as correctional facilities.

Dr. McMann currently provides psychotherapy to adults, adolescents, children, couples and families. In addition to therapeutic services, Dr. McMann conducts pre-employment psychological screenings and evaluations for multiple public service agencies, including police and fire departments, and dispatch/ communications centers. Dr. McMann traveled to McMurdo Station and South Pole Station in Antarctica in January 2015 to conduct pre-deployment screenings for winter-over candidates. Dr. McMann conducts various trainings for both law enforcement and civilians for Crisis Intervention Training, Peer Support, Verbal De-escalation, and Threat Identification and Intervention, among others. Dr. McMann has responded to numerous critical incidents to provide debriefing services.

Dr. McMann is a member of the American Psychological Association and the International Association of Chiefs of Police.

Jaclyn Miller, Psy.D. 
Jaclyn Miller received her Bachelor of Arts degree in Psychology from the University of Rochester in 2009. She received her doctorate in Clinical Psychology with a concentration in Forensic Psychology from Massachusetts School of Professional Psychology in 2014.  Dr. Miller moved to Denver, Colorado in July, 2013 to complete her APA pre-doctoral internship at Community Reach Center.  She has clinical experience and training in forensic and police psychology, violence risk assessment, psychological assessment, trauma, adult and child psychopathology, crisis management, substance use disorders, and severe and persistent mental illness.  She has worked with children, adolescents, and adults in a variety of settings including inpatient hospitalization, community mental health, outpatient, and secure treatment settings.  Her doctoral research was accepted for presentation at the Annual American Psychological Association Conference in Washington, D.C., in August, 2014. Dr. Miller elected to stay in Colorado beyond her pre-doctoral internship as she very much enjoys the clinical work she does as an outpatient therapist at Nicoletti-Flater Associates. 


 Debra Tasci, Psy.D., ABPP
Dr. Debra Tasci has over 35 years of clinical practice helping individuals, couples and families. She has extensive experience in trauma debriefing with airline personnel, law enforcement agencies, emergency medical workers, and victims of crime. She holds a Master’s Degree in Social Work and a Doctorate in Counseling Psychology. She is a certified Employee Assistance Professional, a member of the American Psychological Association, the Colorado Psychological Association, and the International Association of Chiefs of Police. Additionally, she is a Substance Abuse Professional, with expertise in the area of chemical dependency, and she conducts substance abuse evaluations for the Department of Transportation for individuals holding safety sensitive jobs. She has completed training in Emotionally Focused Therapy (EFT) designed to help couples in distress, is a certified EMDR therapist, and is the co-author of the Trauma Recovery Handbook. She has worked at Nicoletti-Flater Associates since 1996, conducting individual/couples/family counseling, fitness for duty assessments, trauma debriefing/defusing, substance abuse assessments, and psychological assessments for job applicants seeking employment in Antarctica. She has also been a consultant to the Denver Police Peer Support Team since 1996 and is Board Certified in Police and Public Safety Psychology.


Rachel Nielsen, M.A.

Rachel Nielsen has joined NFA as a doctoral intern working to complete her Doctorate in Clinical Psychology from the University of Denver, Graduate School of Professional Psychology (GSPP). She graduated Cum Laude from the University of Tennessee in Knoxville with a Bachelor of Arts in Academic Psychology. She received her Masters in Forensic Psychology in 2003 and her Masters in Clinical Psychology in 2017 from the University of Denver. Her doctoral paper focuses on stigma theory as it applies to prostitution and sex trafficking.

Rachel has experience in child protective services, state hospital inpatient care, sex offender assessment and treatment, child abuse prevention program management, and mobile crisis intervention. She specializes in forensic psychology, trauma, and behaviorism.  She was the graduate teaching assistant for Behavioral Philosophy in 2016 at GSPP. Rachel has worked with children, adults, couples, and families presenting with a variety of problems including PTSD, anxiety, depression, divorce, child abuse, domestic violence, and sexual assault. She completed training as a Child and Family Investigator in 2007 in Colorado. Rachel is a member of the American Psychological Association, the Colorado Psychological Association, and the Association for Contextual Behavioral Science (Rocky Mountains and Norway chapters).  


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