About the Company Our client is a leading, fully integrated design and build organisation delivering high-quality infrastructure projects across the UK water sector. Combining strong engineering expertise with extensive construction experience, they have built a reputation for delivering innovative and sustainable solutions. About the Role As a Principal Civil Engineer, you will play a key role in delivering major water and wastewater projects from feasibility through to construction and commissioning. You will be responsible for shaping civil engineering solutions, ensuring designs are efficient, compliant, and fully integrated throughout all project phases. Key Responsibilities Lead the design, planning, and delivery of civil engineering solutions across projects Provide technical guidance and ensure all designs meet relevant standards and legislation Collaborate closely with commercial, operational, and construction teams to deliver practical and safe solutions Build strong client relationships and promote a collaborative, one-team approach Manage interfaces between civil and other engineering disciplines Review and check technical documentation across multiple projects Identify and implement improvements in design processes, including sustainable and digital solutions Conduct site visits to ensure buildability and integration with existing systems Mentor and support the development of junior engineers within the team Requirements Degree in Civil Engineering or a relate