

Oversee production of technical documents, calculations, drawings and specifications
Provide discipline-specific expertise (Civil, Mechanical, Electrical or Process) across feasibility, concept and detailed design stages
Drive innovation, quality and consistency in project delivery
Coordinate with multidisciplinary teams and external stakeholders
Support junior engineers and contribute to design reviews and technical governance
Ensure designs are compliant with industry standards, client requirements and regulatory frameworks
Lead the design and technical delivery of water and wastewater treatment projects
Chartered status is desirable but not essential
Strong understanding of UK water treatment assets, processes and design standards
Excellent communication and stakeholder engagement skills
Track record delivering complex projects from concept through detailed design
Discipline-specific degree or equivalent in Civil, Mechanical, Electrical or Chemical/Process
Proven experience as a Principal Design Engineer within the water sector (essential)
Ability to lead teams, manage workloads and provide technical assurance
Contract roles inside IR35 with competitive day rates
This is a key opportunity to join high-profile infrastructure projects, with flexibility on office location and potential for long-term engagement. Contract roles are offered inside IR35 on a competitive day rate, and permanent employment will be considered for the right candidates.
Flexible UK office location
Opportunity to work on major national water infrastructure programmes
Option for permanent employment if preferred
Flexible UK location - Contract (Inside IR35) or Permanent