About the role

At Jacobs, we’re challenging today to reinvent tomorrow by solving the world’s most critical problems for thriving cities, resilient environments, mission‑critical outcomes, operational advancement, scientific discovery, and cutting‑edge manufacturing—turning abstract ideas into realities that transform the world for good. Join Jacobs’ UK Ecology Team as a Principal Ecologist and become part of a dynamic, forward‑thinking organisation that’s making a real impact—locally and globally.

We’re hiring nationwide, with opportunities available in our offices across Birmingham, Bristol, Cardiff, Edinburgh, Glasgow, Leeds, London, Manchester, Newcastle, Peterborough, and Reading. Wherever you’re based, you’ll find a welcoming team and exciting projects waiting for you.

At Jacobs, we don’t just offer jobs—we build careers. You’ll be joining a respected and ambitious company with a strong reputation for excellence and innovation. Our commitment to your growth is backed by a Global Career Framework, a Chartership Academy Programme, Employee Networks & Communities of Practice, and a culture of collaboration and sustainability.

Benefits

• Global Career Framework – chart your path with clarity and purpose
• Chartership Academy Programme – support to achieve professional accreditation
• Employee Networks & Communities of Practice – connect with over 200 ecologists in the UK & Ireland, and 600+ globally
• A culture of collaboration and sustainability – work on projects that matter

Responsibilities

• Delivering major infrastructure projects across water, transport, and energy sectors for clients such as Anglian Water, National Highways, Network Rail, and more.
• Applying your expertise in Environmental Impact Assessment, Habitats Regulations Assessment, and/or Biodiversity Net Gain.
• Collaborating across disciplines, ensuring ecological requirements are integrated into project design and delivery.
• Leading ecological monitoring programmes, managing surveys and ensuring high‑quality data collection.
• Providing expert advice and acting as the main point of contact for clients and stakeholders on large‑scale projects.
• Building cross‑functional networks, working with specialists across geographies and cultures to develop effective solutions.
• Mentoring and sharing knowledge through global communities of practice, conferences, and training events.

Qualifications

• Strong background in terrestrial ecology with significant industry experience.
• Chartered membership (or eligibility) of a relevant professional body.
• Proven track record in leading ecological input on large‑scale projects.
• Excellent written and verbal communication skills, with sharp attention to detail.
• High level of personal accountability and professionalism.
• A technical specialism in terrestrial ecology—or broad experience with the ability to adapt quickly to new areas.

Our culture and values

Jacobs embraces safety, integrity, inclusion, and belonging. We support one another through a culture of caring and champion positive mental health and a sense of belonging for all employees. We strive to embed inclusion and diversity in everything we do, accepting people for who they are, regardless of age, disability, gender identity, marital status, mental health, race, faith, belief, sexual orientation or socioeconomic background, and whether you’re pregnant or on family leave.

We value collaboration and believe that in‑person interactions are crucial for both our culture and client delivery, while empowering employees with a hybrid working policy that offers flexibility and the best of both worlds.