Improving key and strategic infrastructure whilst promoting a safe, enhanced and sustainable environment for Wales.

Who we are



We are a professional association of local authority chief officers who operate at the strategic tier of local government in Wales. We play a key role in planning and delivering local and national initiatives including:

  • transportation;
  • waste management;
  • traffic management;
  • road safety;
  • highways development;
  • transport planning;
  • engineering and construction;
  • bridges and structures;
  • street lighting;
  • fleet management and maintenance;
  • environmental management;
  • highways maintenance; and
  • public rights of way.

We have members from each of the 22 local authorities across Wales and we have strong links with the Welsh Government and Welsh Local Government Association.





We work closely with the Association of Directors of Environment, Economy, Planning and Transport (ADEPT), the Society of Chief Officers of Transport in Scotland (SCOTS) and the Northern Ireland Road Service.

We have several groups which have been established to review specific activities and functions and these are supported by a number of staff from the 22 local authorities. These groups report to the management committee and they are vital in providing capacity to tackle common issues and in building skills and capacity.

What we do


We aim to help improve the economic, social, environmental and cultural well-being of Wales by:

  • Developing and maintaining transport and highway networks which is vital to movement of goods and people.
  • Sharing and promoting best practice to ensure that service delivery is carried out in the most effective, efficient and economic way.
  • Protecting and enhancing our natural environment.
  • Maintaining and enhancing public spaces.
  • Highlighting the value to the Welsh economy from infrastructure development and the delivery of the services in Wales.
  • Reducing risk to the public and the public sector organisations.

Our chair


Marcus Lloyd is the Head of Infrastructure for Caerphilly County Borough Council and has been in post as Chair of CSS Wales since June 2020. Marcus started his career with Mid Glamorgan County Council in 1989 and has worked for Caerphilly since the Local Government Reorganisation in 1996. Within Caerphilly, Marcus has held senior positions in Highways, Housing and currently manages the authorities Infrastructure plus Waste Services and Building Cleaning. Marcus is a Chartered Civil Engineer by profession and has been working in the Public Sector for over 30 years.

Contact Marcus Lloyd.


Message from our chair