About us

Andrea Wojtak and Wayne Hissong are security consultants with extensive experience in investigations and conflict resolution. Our agency, MacLellan Security, assists corporations, NGOs and non-profit organizations with services ranging from de-escalation training to investigations into criminal and workplace misconduct.

Our specialized services include skills training in conflict de-escalation and reducing/handling workplace violence; training in dealing with employees or customers with unstable or aggressive behaviours and/or substance abuse or cognitive issues; and providing impartial investigations into criminal and workplace misconduct, including allegations of harassment, bullying, policy violations, breach of duty, theft and fraud.


Lt Hissong is a security specialist with 30 years of domestic and international security and investigations experience. He was a police lieutenant and SWAT commander in the United States for 20 years before embarking on an international career in security, first with the United Nations and then as a private consultant.

Lt Hissong now develops and delivers training on de-escalation, crisis management, workplace violence, and critical security incidents including active shooters, and conducts workplace investigations into harassment, theft and misconduct. He has delivered trainings to businesses and non-profit organizations in Canada as well as police departments in North America, the Balkans, the Middle East and West Africa.

He is certified in Special Weapons and Tactics, investigations, executive protection and counter-sniper tactics. He also holds an MSc in Criminology from the University of Leicester and has taught at Wilfrid Laurier University and Lambton College.  He has also provided expert commentary to the CBC on policing issues in Ontario.


Andrea Wojtak holds a BA and Juris Doctorate from the University of Western Ontario, and she has certificates of training in mediation and conflict resolution from the United Nations. She has practised both civil litigation and criminal law, and her extensive investigations background ranges from working as an Assistant Crown Attorney in Ontario to leading investigations for the United Nations into internal and criminal misconduct.

Ms. Wojtak has led investigations into workplace misconduct, including theft, fraud, breach of duty and harassment, and has also led more complex criminal investigations into serious and organized crime. She has advised governments in the Balkans and the Middle East on how to improve investigative techniques and has analysed and provided recommendations on strengthening criminal legislation.