Senior Technical Manager

At Amentum, we’re not just solving problems; we’re engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you’re passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all. We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer 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. 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.

Amentum is seeking an experienced Senior Technical Manager to provide technical leadership across major water and wastewater infrastructure programmes. The role is responsible for leading multidisciplinary engineering teams, ensuring technical excellence, governance and innovation throughout the project lifecycle, from feasibility and design through construction, commissioning and handover.

• Lead and coordinate multidisciplinary engineering teams across water infrastructure projects.
• Establish technical strategies, engineering delivery plans and governance arrangements.
• Provide technical oversight and assurance to ensure compliance with client requirements, legislation and industry standards.
• Manage complex technical risks, interfaces and engineering challenges.
• Support project and programme delivery by aligning engineering activities with cost, schedule and construction requirements.
• Lead design reviews, technical assurance activities, value engineering and constructability assessments.
• Build strong relationships with clients, delivery partners, contractors and key stakeholders.
• Champion innovation, sustainability, digital engineering and low-carbon solutions.
• Mentor and develop engineering teams, promoting technical excellence and professional growth.
• Support bids, proposals and business development opportunities across the water sector.

• Degree-qualified in an engineering or related technical discipline.
• Significant experience in technical leadership within the water, wastewater or major infrastructure sectors.
• Proven track record leading multidisciplinary engineering teams on complex projects or programmes.
• Strong understanding of engineering governance, design management and risk management.
• Experience across the full project lifecycle, from feasibility through to commissioning and handover.
• Excellent leadership, communication and stakeholder management skills.

• Chartered Engineer (CEng) or equivalent professional registration.
• Experience working with UK water utilities and major capital delivery programmes.
• Knowledge of digital engineering, BIM and data-led delivery approaches.
• Underst…