Principal Ecologist

Location: Greater London

Our Vacancy# Principal Ecologist
* Cross sector
* Permanent /
* London* United Kingdom
* 13/02/26
* On site
* Share As global challenges related to climate change, biodiversity loss, and sustainable development intensify, the role of ecological expertise has never been more critical. Our growing ecology practice is at the forefront of delivering practical solutions that promote environmental resilience, biodiversity conservation, and responsible land use.  We support a wide range of projects—from infrastructure development and renewable energy to habitat restoration and environmental planning—by integrating ecological principles into every phase of design and decision-making.

Our team of ecologists work closely with clients, communities, and stakeholders to ensure that development and conservation go hand in hand.  With a strong focus on innovation, regulatory compliance, and long-term ecological health, we are committed to advancing a more sustainable and nature-positive future.

Assystem is a global engineering and digital services company that plays a key role in large infrastructure projects, especially those related to complex, highly regulated industries. In the
** infrastructure sector**, Assystem works across various domains to support the
** design, construction, operation, and maintenance
** of critical infrastructure.##

Job Description
** 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.
** The Role
** 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.
** What You Will Be Doing:
**** Team and Practice Leadership
*** 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
** Project Oversight and Technical Direction
*** 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
** Strategic and Commercial Management
*** 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
** Stakeholder and Client Engagement
*** 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…