Senior Ecologist Arbtech Who we are We are Arbtech. Our team of over 100 passionate professionals supports more than 8,000 projects each year, offering. Our ecology consultancy division is overseen by a team of principal ecologists, each with their own specialisms: BNG, herpetofauna, bats, PEA, HRA and River Condition Assessment. Whether your strengths overlap with these specialisms, or they represen... CRWG1_UKTJ