Senior / Principal Aquatic Ecologist Uk Wide. Our client has one of the most respected biodiversity, EIA and planning practices in the UK, with a well-established aquatic ecology team delivering high-quality ecological services on complex projects across a wide range of sectors with the built and natural environment. The Opportunity Our client is seeking a Senior Aquatic Ecologist to join their growing Aquatic Ecology team. The role is ideally suited to a freshwater ecologist, although experience in marine ecology would be advantageous. You will provide specialist aquatic ecology inputs to a diverse portfolio of projects and support the continued growth of the team through technical excellence and collaboration. With access to an extensive UK and international project portfolio, the role also offers opportunities to work on innovative overseas projects alongside international colleagues. The team is recognised for operating at the leading edge of professional practice, with a strong reputation for innovation and technical quality. The role is open to candidates nationwide. Flexible and reduced working hours will be considered. Key Responsibilities Undertake aquatic field surveys in freshwater and/or marine environments Lead at least one survey type (ideally fish surveys) and support a wider range of freshwater surveys (macroinvertebrates, macrophytes, diatoms, water quality) Manage and contribute to aquatic ecological assessments, including PEAs, EIAs, HRAs, WFD Assessments and marine assessments Provide aquatic ecology inputs across all project stages, from bidding and feasibility through to assessment and detailed design Support licence applications, including marine licences and flood risk activity permits Mentor and support junior team members About You Professional experience in a similar aquatic ecology role Degree (BSc or MSc) in freshwater biology, marine biology or a related discipline Strong knowledge of UK and European aquatic legislation, including the HRA process Experience in aquatic survey design and delivery Excellent report writing and communication skills Working knowledge of EIA, HRA and WFD assessments Membership of CIEEM or an equivalent professional body This is an excellent opportunity to join a people-focused consultancy delivering impactful aquatic ecology work. The post includes a generous base and benefits with excellent career opportunities.