Trainers and Consultants

CTRI is a leading provider of training and consulting services for individuals, school, communities and organizations affected by or involved in working with issues of trauma, mental health, crisis response and violence prevention. Our trainers are not only specialists in their field, but also dynamic speakers who deliver content-oriented presentations that are both engaging and informative. In addition, our division ACHIEVE Centre for Leadership & Workplace Performance provides workshops for the general public, business and organizations in the areas of leadership development, conflict resolution and organizational performance.

Learn more about CTRI’s Mission, Vision and Beliefs

Ruth Yeo-Peterman, M.A., LMHC


Ruth is a licensed mental health counselor in the state of Washington who holds a Master’s degree in Expressive Therapies and Mental Health Counseling and a Bachelor’s degree in Communication Science. She has more than a dozen years experience working within diverse and challenging environments in both South Africa and the United States, including diversion and rehabilitation, education, youth development, and community based mental health. Ruth is currently Vice President of Program Development and Training with First Aid Arts, where she is responsible for managing, developing, and facilitating experiential trainings for service providers on how to use the arts for trauma recovery.  As a passionate and creative facilitator, she is committed to engaging participants by creating dynamic and supportive spaces for participatory learning.

Krystel Salandanan, PsyD


Krystel is a Licensed Clinical Psychologist based in New York City with a doctorate in psychology from The Wright Institute and a bachelor’s degree in psychology from the University of Washington. She has specialized experience in behavioral therapies, mindfulness-based techniques, behavioral medicine/health psychology, multicultural psychology and crisis intervention. In addition to training with CTRI, she works as a psychotherapist in behavioral medicine, working in a wide range of medical clinics and nursing facilities throughout New York City’s five boroughs. Complementing workshops with real-life clinical examples, practical skills training and a high-energy passion, she engages workshop participants in thoughtful discussion to optimize learning.

Jenna Mack, M.Ed., LPC-S, RPT


Based out of Fort Worth, Texas, Jenna has a Master’s degree in Clinical Mental Health from the University of North Texas, specializing in children, adolescents and family therapy. She is a Licensed Professional Counselor Supervisor and a Registered Play Therapist with the Association for Play Therapy. Jenna has worked in a variety of clinical settings including inpatient, outpatient, domestic violence shelter and long term services. She currently owns a private practice called SkyLife Wellness in Southlake, Texas. Jenna specializes in working with problems related to relational aggression, self-mutilation, domestic and partner violence, bullying, family conflict and individuals diagnosed with Autism Spectrum Disorder. Jenna’s breadth of experience, passion for working with families and love of knowledge and growth makes her an engaging and energizing trainer.

Henry Prempeh, PhD


Based in the Washington, DC, area, Henry is a practicing Clinical Psychologist who has extensive clinical and research experience working with children, families and adults struggling with a variety of emotional, psychological and social issues. His background includes work in a variety of settings including schools, juvenile justice system, community organizations and hospitals. Henry also has extensive training and work experience with issues related to teen parenthood and providing comprehensive mental health resources to teen fathers. As a trainer, he is a passionate presenter who brings an ecological framework to all aspects of his work that includes sensitivity to issues related to diversity.

Randy Grieser, MSW, RSW


Randy Grieser is the founder and CEO of the Crisis & Trauma Resource Institute. He is a Registered Social Worker who holds a Master of Social Work degree and a Bachelor’s degree in Conflict Resolution. Prior to founding CTRI, he worked directly with issues of crisis and trauma while being employed in the areas of mental health, counseling and crisis management within community, school and hospital settings. Randy believes that access to knowledge and skill development changes individual lives, communities, and organizations. While he is primarily involved in providing leadership to the development and delivery of CTRI’s workshops and services, he does continue to train in the areas of violence prevention, crisis response and mental health.  Randy is a dynamic presenter who delivers content-oriented presentations that are both engaging and informative.

Vicki Enns, MMFT, RMFT


Vicki is the Clinical Director of the Crisis & Trauma Resource Institute, an Approved Supervisor with the American Association for Marriage and Family Therapy and an instructor in the graduate program for Marriage and Family Therapy at the University of Winnipeg. In her private practice, she specializes in the area of trauma recovery for individuals of all ages, and she helps individuals, couples and families build positive mental health and relational skills across developmental stages. She believes in a holistic approach to wellness that applies to both clients and helpers. Vicki also believes that it is essential for helpers to continue learning and developing their self-awareness alongside evolving clinical skills. She is the author or editor of many of CTRI’s training materials, including those on the topics of anxiety, trauma, mindfulness, gender and sexual diversity, ethics and wellness. As a trainer, Vicki is particularly gifted at creating a learning atmosphere that is collaborative and respectful, and which embraces diversity in personal identity, skills and cultural perspectives.

John Koop Harder, MSW, RSW


John has been working as a therapist and trainer for almost 20 years. He is a Registered Social Worker who holds a Master of Social Work degree. Much of John’s career has centred on working with children, youth, adults and families dealing with crisis and trauma. While he has a diverse practice, he has particular interest and specialized experience in working with individuals and families impacted by mental health concerns, violence, post-war trauma recovery, gender/sexuality issues, sexual abuse recovery and cyber-bullying/harassment. John’s work is also informed by his international experiences working with individuals and communities impacted by civil war and ethnic conflicts in Colombia, Albania and Northern Ireland.  He is a warm and engaging facilitator who values interactive learning experiences.

Jennifer Graville Bricker, MA


Based in Washington, DC, Jennifer holds a Master's degree in Conflict Transformation and is a certified mediator. She combines her commitment to restorative justice, trauma healing and community building in her position as Program Manager for a community-based restorative justice program in Prince George's County, MD. In this role, Jennifer takes the lead in both facilitator training and ongoing support, as well as case management. Her experience as a credentialed teacher contributes to her capacity as a trainer, and she loves energetically engaging participants in topics she is passionate about. Jennifer provides training for CTRI related to Restorative Justice, Conflict and Violence.

Matthew Hartman, MA


Matthew has comprehensive experience as a restorative justice practitioner including ongoing consultation for restorative justice implementation in complex criminal justice systems and dialogue facilitation in cases of severe and violent crime. In addition to strategic planning and program development, he has experience in the expansion and capacity building of the community to play an active role in responding to juvenile crime. Matthew holds a Master’s degree in Conflict Transformation. He also has extensive training and education in trauma healing, qualitative evaluation, conflict analysis and theory, human security, and strategic peacebuilding. As the President for the Restorative Justice Coalition of Oregon, member of the Northwest Justice Forum Planning Committee, and Advisory Committee Member of the Oregon Department of Corrections, Facilitated Dialogue Program, Matthew also is a vital contributor to the Northwest’s restorative justice movement. Working across North America and internationally, he accesses a rich background in restorative justice program implementation, dialogue and conferencing facilitation and training. As a trainer, Matthew brings to his work a strong sense of presence and listening combined with skills to move individuals and groups toward their goals. The resulting safety allows individuals to express their feelings, thoughts and needs which channels collaborative, creative and effective dialogue, planning and problem solving.

Michael Culliton, B. Ed.


Michael has over twenty years of experience with teaching, curriculum design, meeting facilitation and leadership. He has worked with people in health care, education, government, religious institutions, political advocacy, human services and international human rights. Based in Minneapolis, he holds a Bachelor’s degree in Education and is a Certified Dialogue Education Practitioner. As a trainer, Michael has a reputation for being respectful, knowledgeable, well-prepared and engaging.

Aaron Lyons, MA


Aaron holds a Master's degree in Conflict Transformation and, in addition to training with CTRI, is a mediator in the field of restorative justice and conflict resolution. In this role he facilitates dialogue and collaborative processes among victims and perpetrators of traumatic criminal offences. Aaron has a rich background in intercultural peacebuilding, youth justice, addictions treatment and outdoor leadership. A gifted facilitator, Aaron brings insight, analysis and energy to the learning environment. He facilitates CTRI trainings in the areas of restorative justice, violence and conflict.

Nick Ladd, MEd


Nick holds a Master’s degree in Elementary Education and is a licensed Elementary and Middle School Teacher in Michigan. He has worked extensively with children, youth and families in a variety of educational and community contexts. In addition to training for CTRI, Nick is co-pastor at a local church where he is involved with education, pastoral care and counseling. He is a naturally engaging presenter with a passion for creative and interactive teaching.

Shadell Permanand, BTh


Shadell has more than 18 years experience in the areas of conflict resolution, restorative justice and cultural diversity education. Her key roles have included Executive Director of a conflict resolution and restorative justice organization in Toronto, Canada, as well as senior leadership roles at York University and University of Toronto related to conflict resolution, crisis management, developing restorative student conduct programming, equity/diversity and public education. Shadell is an engaging facilitator who is passionate about developing environments that support equity, inclusion, restorative justice and constructive conflict resolution.