Acer Ecology has undertaken projects on behalf of a wide range of clients including:
- Brecon Beacons National Park
- Bridgend County Borough Council
- Buglife
- CADW
- Cadwyn Housing Association
- Caerphilly County Borough Council
- Cardiff Community Housing Association
- Carmarthenshire County Council
- Cuddy Group
- Forestry Commission Wales
- Groundwork Neath Port Talbot
- Harris Pye Group
- Hendre Housing Association
- Interserve
- Laing O’Rourke
- Leadbitter
- Merthyr Tydfil County Borough Council
- Merthyr Tydfil Housing Association
- Monmouthshire Housing Association
- Natural Resources Wales
- Neath Port Talbot Council
- Newent Town Council
- Newport City Council
- Newydd Housing Association
- Persimmon Homes
- Royal Wootton Basset Town Council
- RPS
- South Gloucester Council
- Swansea City Council
- WSP Group
- WYG