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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 jujitsu.

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.


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Lee square

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 jujitsu and hill walking, recently completing the gruelling ‘Three Peaks Challenge’.

Greg worked for a kitchen appliance installer before joining us. He takes pride in his work and has completed an apprenticeship with Brennan & Son to NVQ level 3 in Plumbing and Gas. He enjoys surfing, climbing and adventure sports.

Lee enjoyed a career in security before joining Brennan & Son. In his spare time, he enjoys spending time with his young family and snow boarding.



Adam B




Nicky works in the office doing book keeping, invoicing and answering queries. Mum of two Nicky has a background in business. She enjoys sport including running and military style fitness training.

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

Carol is responsible for organising gas safety inspections. She has a background in the lettings industry. Her favourite way to relax is to spend time in the West Country.




Adam D


Do you see yourself here?

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

Adam worked in a bathroom fitting Company installing easy access showers and baths for the elderley.  He enjoys football, golf and motor racing.

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