We'll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow.  With more than 55,000 people in 40+ countries, working with us offers an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.

Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About The Opportunity

Amentum provides client-oriented solutions across our environment, energy, and defence businesses. With a strong order book and a diverse, exciting portfolio of projects across the UK and internationally, we need to expand our team of environmental specialists across multiple disciplines required to deliver a project lifecycle—from new build and operations through to decommissioning and site end use. We offer opportunities for significant career advancement, attractive remuneration, and flexible working, as well as leadership and client relationship role development.

We are seeking a Principal/Senior Consultant with environmental permitting expertise to join our expanding team. In this client-facing role, you will develop and manage best available technique (BAT) methodologies to quantify and mitigate risks associated with nuclear waste management and new build nuclear infrastructure. We welcome candidates from both consultancy and regulatory backgrounds, especially those with experience as a statutory peer reviewer in environmental permitting.

This role can be based in Harwell, Cumbria or Birchwood.

Key Responsibilities:

• Technical Leadership: Lead, manage, and deliver environmental permit applications/authorisations focused on air quality, water quality, materials management, and waste management.

• Best Available Techniques: Develop methodologies that consider climate resilience, emissions, noise, biodiversity, water discharges, and heritage—adopting cutting-edge approaches to environmental assessments.

• Nuclear Focus: Serve as the discipline lead for environmental permitting in nuclear waste management, guiding project teams to meet technical and regulatory requirements.

• Stakeholder Engagement: Communicate impacts, mitigation measures, and outcomes to clients, regulators, and other stakeholders. Facilitate both technical and non-technical meetings, including public consultations and client workshops.

• Project & Business Contribution: Manage and deliver inputs into safety cases, competition bids, permit variations, and planning applications. Evaluate risks and opportunities related to permitting, offering strategic insights to project stakeholders.

Here's What You'll Need:

Below are the qualifications and experience that we’re seeking in applicants. We understand that not everyone will meet every single requirement, so if you believe you have most of the relevant experience and strong potential to succeed in this role, we’d love to hear from you.

• Environmental Permitting: Minimum five years’ experience leading the preparation of environmental permit applications and developing BAT/BPM studies for chemical, oil and gas, petrochemical, or waste management operations.

• Technical Expertise: Background in botany, zoology, marine sciences, geosciences, atmospheric chemistry, geology, ecology, or a related field.

• Professional Qualifications: Chartered Environmentalist, Ecologist, Chemist, Physicist, or equivalent accreditation.

• Communication & Problem-Solving: Strong interpersonal, analytical, and problem-solving skills, with the ability to tackle complex challenges.

• Flexibility: Willingness to travel on business as required, including visits to overseas sites. Experience or interest in regulatory review or peer-review processes is a plus.

This is an exciting opportunity for a seasoned professional looking to advance their environmental permitting career within the nuclear and high-hazard industrial sectors. If you’re driven, technically adept, and motivated to lead on complex permitting challenges, we’d love to have you join our growing team.

Our Culture:

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centered on inclusion and diversity.

We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit www.vercida.com to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed,  marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.