"People will forget what you said ... they will forget what you did … 

but people will never forget how you made them feel."

~ Maya Angelou

Denise Koster, has worked in the area of violence since 1985. Denise provides management and labour groups with investigation services, practical education, intensive training and consultation. These services specifically focus on the identification, assessment, investigation and management of workplace violence, code and non-code harassment, sexual harassment, bullying and elder/resident abuse. 

As a Certified Threat Manager (CTM), graduate of Gavin Debeckers’ Threat Assessment and Management Academy, and Certified Workplace Violence and Threat Specialist (WVTS), Denise provides workplaces with customized threat assessment and management plans.

For 9 years prior to engaging in Koster Consulting & Associates on a full-time basis, Denise was a Clinical and Program Director at a Community Health Centre, where her role was to manage a multi-disciplinary team of medical, nursing and social service professionals.


Association of Threat Assessment Professionals 

Certified Threat Assessment Manager (CTM) 

McAfee Institute

Workplace Violence & Threat Assessment Specialist (WVTS)

Gavin de Becker Advanced Threat Assessment and Management Academy

Institute of Peace and Conflict Studies - Conrad Gerbal University Collage - Waterloo, Ontario

Alternative Dispute Resolution - Level 2

Institute of Peace and Conflict Studies - Conrad Gerbal University Collage, Waterloo Ontario

Alternative Dispute Resolution - Level 1

International School of Investigation and Protective Services


Registered and Approved as a Private Charter College under the Private Career Colleges Act – Ontario Canada
Certificate Authentication Code: OH-113-433-951-621

Ryerson University

Gerontology Certificate

Ryerson University

Bachelor of Applied Arts