Qualifications: BSc (Hons), PhD, MCIEEM, First Aid at Work, CSCS Professionally Qualified Person, ROLO H&S, FISC 4
Specialisms: Sand lizard, smooth snake, reptiles, GCN, natterjack toad, amphibians, non-marine molluscs, heathland, coastal dunes, biogeography, palaeoecology, palaeontology, geomorphology
Licences: sand lizard, smooth snake, great crested newt CL09, natterjack toad, Roman snail

Chris founded CGO Ecology in 2008, when he was primarily a herpetologist. Since then he has expanded his expertise, and worked in rail and road infrastructure, minerals, renewables, housing, conservation, monitoring, training and research. Previously he managed sand lizard, smooth snake and NARRS surveys for Amphibian and Reptile Conservation; lectured at Coventry University and Bournemouth University; and worked at English Nature (geologist), English Heritage (archaeologist), and Ordnance Survey (cartographer). He has a PhD in the palaeoecology and palaeobiogeography, with specialist skills in the identification of herpetofaunal skeletal remains. He is former Chair of the British Herpetological Society, on the Council of the Conchological Society of Great Britain & Ireland, and a Visiting Research Fellow at Bournemouth University. He co-wrote CIEEM survey skills competency notes for reptiles and natterjack toad. He is a well-known herpetologist, and an accomplished non-marine malacologist, with survey licences covering England, Scotland and Wales. Other competencies include Phase 1 habitats, Hedgerow Regulations, butterflies (WCBS surveyor), fairy shrimps, eDNA, badger, water vole, fish, birds and NVC/botany (FISC level 4), BREEAM, HQM, BS5837 trees. He is an avid music-lover, traveller, and follower of politics and current affairs.

Dr Chris Gleed-Owen

Director & Principal Ecologist

Specialisms: Sand lizard, smooth snake, reptiles, GCN, natterjack toad, amphibians, non-marine molluscs, heathland, coastal dunes, biogeography, palaeoecology, palaeontology, geomorphology

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Dan Hawthorn

Principal Ecologist

Specialisms: Dan has both GCN and Bat licences for England and Wales and has over 10 years’ experience working as a professional ecologist from a total of 25 years undertaking wildlife surveys.

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Sandi Leiber

Finance & Administration Manager

Specialisms: Business administration and finance

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Harri Wishart


Specialisms: Harri is particularly interested in reptiles and bats, and is excited to be working towards bat and GCN licences.

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Scott Armstrong

Ecologist (East Anglia)

Specialisms: Birds, reptiles, amphibians, dormice, mammals

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Jess Smith

Associate Ecologist (Southeast)

Specialisms: Reptiles, amphibians, dormice, mammals

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Steve Allen

Associate Ecologist & Arborist (Southeast/East Anglia)

Specialisms: Trees, Bats, Woodland, Fencing, Barn owl

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Paul Callister

Associate Ecologist (Northeast)

Specialisms: Climbing, ropework

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Rebecca Perl


Specialisms: Communications, copywriting, editing, marketing

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Jonathan Crewe

Associate Ecologist (Southwest)

Specialisms: Bats, badgers, reptiles, amphibians

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Chris Cathrine

Associate Ecologist (Scotland)

Specialisms: Birds, invertebrates, reptiles, amphibians, collision risk modelling

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Noel Bergin

Associate Ecologist & Arborist (Southwest)

Specialisms: Bats, hazel dormouse, reptiles, heathland, woodland, trees, health & safety

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Katie Warren

Associate Ecologist

Specialisms: Barn owl, bats, reptiles, GCN, dormouse

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Dr Todd Lewis

Associate Ecologist (Southwest)

Specialisms: Reptiles, amphibians, tropical ecology

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Ian Bradley

Associate Ecologist (Northeast)

Specialisms: Great crested newt, amphibians, reptiles, badgers

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Alex Flinn-Shephard

Assistant Ecologist (Midlands)

Specialisms: Biodiversity of farmland

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Mike Phillips

Associate Ecologist (Southeast)

Specialisms: GCN, reptiles, GIS/remote sensing, tree/habitat management.

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