09/07/2026
After more than 60 years in business, Denis O'Brien has officially closed the doors of O'Brien's Diesel Engineering, bringing to a close an incredible chapter in Wagga Wagga's history.
For generations, Denis built a reputation not only as an exceptional engineer but also as a passionate motorsport competitor, mentor, community contributor and someone always willing to share his knowledge. His story is one of hard work, innovation and dedication to both his customers and the wider community.
PGC Security has had the privilege of looking after Denis's business for around 20 years, after we purchased AU Security. Over that time, Denis became much more than a valued client. Through his involvement with the Wagga Boat Club and his love of powerboat racing, he and Jan became close family friends.
We've also lost count of how many times Denis would ring to speak with our previous owner, Shane. You always knew it was Denis because the laughter would soon echo throughout the office. Those conversations were never just about security - they were about friendship.
Congratulations, Denis, on an extraordinary career and the legacy you've built. Thank you for your contribution to Wagga, to motorsport, and to so many people whose lives you've touched along the way.
We wish you and Jan every happiness as you begin this new chapter. We have no doubt retirement won't slow you down for long, and we're looking forward to seeing you around the boat club and at the racetrack, and catching up over plenty more laughs.
Enjoy your well-earned retirement, Denis. You've certainly earned it. 👏
📷 The Daily Advertiser