Brennan & Son was founded in 1985 by Derek Brennan. Derek worked on the oil rigs but becoming a single parent led him to work closer to home. He applied his skills to the plumbing trade and became Corgi registered in 1985. Both of his sons, Justin and Demian worked for Derek after they left school. Justin went on to university to study computer science and Demian continued to work in the family business and the company Brennan & Son was formed. In 2002 another family member Justin’s wife Sarah joined the company after the birth of their first child. Five years later Justin left his computing career to help the family business expand. Today Brennan is one of Southampton’s leading plumbing firms with a highly committed and enthusiastic team.



Justin Brennan


Demian Brennan

Derek is a member of the Institute of Plumbing and Heating Engineers. He’s well travelled across Asia, America and Europe. He enjoys reading about history, gardening and spending time with his children and grandchildren.

Before entering plumbing Justin was a Microsoft Certified computer engineer. He’s transfered his technical skills to his role at Brennan & Son. He enjoys spending time with his two children, reading and jiu-jitsu.

Demian has been with Brennan & Son all his working life and has a wealth of valuable experience. In his spare time he enjoys reading science fiction and computer gaming.




Adam joined the team after a career in steel works and pub management. He enjoys going to the gym and playing football and rugby.






Office manager Sarah spent a decade working for an international cleaning company before joining the family firm to oversee its expansion. Mum of two, she enjoys jiu-jitsu and hill walking, recently completing the gruelling ‘Three Peaks Challenge’.

Nicola worked at an estate agents before coming to Brennan & Son. She is the mother of two children and enjoys hot yoga and zumba.




Do you see yourself here?


Neil has spent most of his life working for the MOD creating robots. He enjoys reading and model making.

If you feel you are the perfect fit for this Company give Sarah a call in the office.