About Us

Our History

Brennan and Associates is a licensed investigation company that has been providing professional services to Insurance, Corporate, Government and Private sector clients for over 30 years. We are a company built around strong core values and high ethical standards. Having conducted over 14,000 investigations, we have established a reputation as one of the most trusted, reliable and experienced investigation firms in Australia.

Click on the timeline below to reveal significant milestones in our business ……

Our Beginnings……                                

The company was started by John and Gwen Brennan in the late 1980’s and gradually grew into one of Western Australia’s most trusted and reliable investigation firms on the back of the hard work and dedication of its founders. Our company quickly earned a reputation for producing high quality, cost effective investigations for our clients, many of whom we still have strong relationships with today .

Our Management Team

Our philosophy is to provide a quality service, delivered by professionals who understand your needs.

Mark Brennan | Brennan Investigations

Mark Brennan

Managing Director

Mark is our Managing Director and has been the driving force behind building a professional, reliable business, centered around strong core values and high ethical standards. Mark has always worked to create a rewarding, inclusive and enjoyable working environment for all staff. He is extremely knowledgeable in all areas of the business, including both factual and surveillance investigations, file management and file auditing. Mark is also responsible for client relationships and strategic growth of the business. Mark holds a Certificate III in Investigative Services and a Certificate IV in Government Investigations.

Ady Claxton | Brennan Investigations

Ady Claxton

Director Operations Manager

Ady has been working at Brennan and Associates for 12 years. Initially joining as a factual investigator, Ady was instrumental in setting up the surveillance division and he continues to oversee this area of the business today. Ady is also responsible for staff training and compliance. He has a background in Policing (in the UK) and has extensive experience in conducting complex insurance investigations, managing personnel, file management and file auditing. Ady holds a Certificate IV Government Investigations and Certificate III in Investigative Services.

Simon Smith | Brennan Investigations

Simon Smith

Director Workplace Investigation Services

Simon is the head of our Workplace Investigation Services division. Simon brings a wealth of knowledge and professionalism to the business and under his management our Workplace Investigations division is quickly becoming a preferred provider for a number of legal firms and corporate clients. Simon has previously held the position of Principal Investigator for the Commonwealth Government Workplace Regulator and has a background in Policing in the UK and Western Australia. He holds a Diploma of Government (Investigations), Certificate IV Government (Investigations) and Certificate III in Investigative Services and has extensive experience in evidence gathering, witness management and interpretation of criminal legislation.

Bryn Thornton | Brennan Investigations

Bryn Thornton

Investigator/OSH Manager

Bryn has been working in the business since 2008, originally joining as a factual investigator. Bryn has previously worked in a number of industries including Casinos, Prisons, Transport and Construction. He has gained experience in policy development, change management, insurance, HR and WHS management, and safety auditing. Bryn holds a Cert III in Investigative Services, Cert III in Corrective Services, Cert IV in OH&S, Diploma in WHS and he is currently studying Business Law part time at Murdoch University.

The team | Brennan Investigations

Office Team

Elaine, Michelle, Karen & Lisa

Elaine, Lisa, Michelle and Karen run the office and are responsible for file and data management, client updates and accounts. Elaine and Lisa have a combined 30 years in the business and are specialists in the insurance industry.

Angela Anson

Senior Liability Adjuster

Angela is our Public Liability Claims specialist. Angela regularly undertakes complex investigations under legal instruction and is considered one of the most respected liability investigators in the industry. She is a Senior Associate ANZIIF and an Associate of Chartered Insurance Institute (UK)

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