Principal Ecologist

Principal Ecologist ASSYSTEM
• London, England, United Kingdom

Are you ready to lead at a strategic level and shape the ecological direction of major infrastructure and development projects? At Assystem UK
, you will step into a senior leadership role within our Ecology Consultancy team, influencing projects from early planning through to construction and operation while driving the growth and performance of the ecology practice itself.

As a Principal Ecologist, you will provide senior technical leadership, quality assurance and trusted client advice across complex, multidisciplinary project environments. You will work closely with clients, principal contractors and engineering teams, often embedded within live delivery settings where sound judgement, commercial awareness and clear direction are essential.

You will ensure ecological risks are managed effectively, standards remain high and projects are delivered successfully both technically and commercially. Beyond project oversight, you will lead people, shape strategy and champion best practice across the ecology discipline.

• Lead, mentor and manage a team of ecologists across senior, mid-level and junior grades
• Align team resourcing with project demands, managing workloads and supporting recruitment where needed
• Promote best practice in ecology, health and safety, quality assurance and legislative compliance
• Drive continuous improvement and technical excellence across the ecology practice

• Oversee ecological delivery across housing, infrastructure, renewables and energy projects
• Provide strategic ecological direction through planning, consenting and construction phases
• Lead and quality assure surveys, assessments, mitigation strategies and technical reports
• Provide high-level technical review of EIAs, HRAs, mitigation strategies and Biodiversity Net Gain assessments
• Oversee construction-phase compliance with wildlife legislation, licence conditions and mitigation commitments
• Lead protected species mitigation strategies and EPS licence preparation and delivery
• Investigate ecological incidents and implement proactive portfolio-wide risk management measures

• Develop and implement growth plans aligned with wider business objectives
• Lead or support tenders, fee proposals, client presentations and framework bids
• Monitor project profitability, resource forecasts and overall performance of the ecology portfolio
• Ensure robust QA processes and effective risk management systems are embedded across projects

• Act as a senior point of contact for clients, regulators, collaborators and partners
• Build and maintain strong professional networks to support business development
• Represent the ecology discipline internally and externally at industry events and forums
• Provide confident leadership within multidisciplinary coordination and client environments

You will hold a degree in Ecology, Environmental Science or a related discipline, supported by significant experience in applied ecological consultancy and leadership of complex infrastructure projects.
You will also bring:

• Two European Protected Species licences
• Strong knowledge of UK wildlife legislation, planning policy and best practice including EIA, HRA and BNG
• Extensive experience managing teams, budgets and multidisciplinary project delivery
• Membership of the Chartered Institute of Ecology and Environmental Management, with Full Membership required if not already held
• Proven ability to deliver strategic, proportionate ecological solutions within complex live environments
• Excellent report writing, review and quality assurance capability
• Strong commercial awareness, business planning insight and client engagement skills
• A full UK driving licence and willingness to travel to project sites

• A Full or Chartered member of the Chartered Institute of Ecology and Environmental Management
• Highly experienced in Ecological Clerk of Works duties and construction‑phase leadership on major infrastructure schemes
• Expe…