Please rotate your device

Iestyn Lewis Chief Executive Officer

BSc (Hons) DipCS (Cantab) CEng MICE

Iestyn Lewis studied at Bath and Cambridge before becoming a Chartered civil engineer and was awarded the James Rennie medal by The Institution of Civil Engineers in 2006.

He has broad experience in a variety of sectors includes fund monitoring, risk management, residential, student, hotel, office, retail, infrastructure, health and mineral mining. With both a development and consultancy background, he has worked with numerous delivery formats including new build, refurbishment, and covering listed buildings and national monuments.

Starting the business in 2007, Iestyn has overseen the expansion across several different sectors and on a national basis. His has overall responsibility for the strategic direction of the business and leads his own assembled senior management team to deal with the development of the company.

Peter James Managing Director

With over 30 years’ experience in the financial and property sectors, Peter James is a Managing Director of the development arm of Iesis ltd. Formerly a high ranking civil servant, he then moved into the private sector specialising in property development, funding and delivery.

Prior to joining the Iesis team, Peter spent 15 years as managing director of one of the largest family office development funds in the UK.

Chris Birakos Development Director


Chris started his career in property working in Bristol as Development Manager for a private real estate developer and investor before moving to the Development team at Savills in 2010.

As an Associate Director in Savills Bristol office, Chris was predominantly focused on development agency and consultancy in Bristol and Bath and advised on some of the highest profile instructions in these markets.  Chris was awarded the RICS Young Surveyor of the Year award in the Planning and Development category in 2015.

At Rengen Chris is responsible for sourcing and delivering a number of the residential and mixed-use development projects.

Daniel Cheng Associate Director

Dan joined Rengen Developments in 2016 as our Asset and Development manager. He quickly transitioned into an Associate Director role, following a successful year of managing our properties, which includes commercial, residential and student accommodation.

Harry McCullough Associate Project Manager