Who we are

Jim Mullholland

BSc (Hons) Dip Arb L6 (ABC) MCIEEM MArborA



Jim is an ecologist and arboriculturist specialising in bats and veteran trees. He has been involved with bat research since 2005 and has a diverse range of work experience having worked in consultancy, local authority and charity sectors.

Jim holds Natural England Class 3 and 4 bat survey licences, and is a Trainer for the Natural England Roost Visitor scheme. He also holds a Natural Resources Wales survey licence.

He has a strong background in training, having developed and delivered courses for the Chartered Institute of Ecology and Environmental Management (CIEEM), the Arboricultural Association, the Ancient Tree Forum. He is also a LANTRA registered trainer.

Sean Shereston

BA (Hons) Dip Arb L4 (ABC) TechArborA


Sean has been working in environmental conservation since 2009, with a specialism in arboriculture and bat work. He has been involved in a range of research and commercial projects including extensive bat trapping and radio-tracking surveys.

Sean holds Natural England Class 2 and Natural Resources Wales bat survey licence.

He has delivered training throughout his career ranging from practical climbing and chainsaw units, to bat awareness and advanced bat survey techniques. He is also a LANTRA registered trainer.



Our Aim

1 Provide a structured approach to assist professionals in developing sufficient knowledge and skills to hold a bat survey licence.


2 Improve standards in the discipline of bat surveying through the development and provision of high quality professional training.


3 Reduce the burden on local bat groups and volunteer trainers.

4Encourage collaboration between disciplines, to further bat conservation.

5 Assist professionals in developing their skill set and improve career prospects.