Principal Design Engineer

Alexander Associates Limited; Glasgow; On-site; GBP 70,000 - 100,000; Full time

Job summary

Alexander Associates Limited in Glasgow is seeking a Principal Design Engineer to lead multi‑disciplinary water and wastewater projects for major UK infrastructure.

You will provide technical leadership, ensure designs meet standards, mentor engineers, and build strong client relationships while driving innovation and best practice.

Qualifications

• Degree qualified in Civil Engineering or related discipline; equivalent qualifications accepted.
• Significant experience in municipal water and wastewater.
• Chartered Engineer (CEng) or working towards chartership.
• Experience in contractor, consultancy, or design‑and‑build environments.
• Knowledge of water and wastewater assets, including treatment processes and civil structures.
• Strong knowledge of British Standards and health and safety regulations.
• Experience in QA and health and safety management systems.
• Ability to review engineering calculations, reports, specs and design documentation.
• Experience undertaking hydraulic calculations and assessments.
• Knowledge of structural design for water-retaining structures and reinforced concrete detailing.
• Experience leading technical discussions with clients and developing engineering solutions.
• Experience leading design reviews, progress meetings and site meetings.
• Understanding of NEC contracts.
• Understanding of quality, environmental and health and safety management systems.
• Strong communication and technical report-writing skills.
• Proven ability to lead teams and deliver projects to programme and budget.

Responsibilities

• Provide technical leadership across multidisciplinary water and wastewater projects.
• Deliver high-quality engineering solutions with Design Managers, Discipline Managers, Design Leads, and Principal Engineers.
• Act as a technical authority, resolving complex engineering challenges and driving technical excellence.
• Ensure designs meet relevant standards, regulations, client requirements and project objectives.
• Provide governance and technical assurance across your discipline.
• Coordinate with other engineering disciplines to support integrated project delivery.
• Support procurement, construction, commissioning and site teams with technical expertise.
• Drive innovation, continuous improvement and engineering best practice.
• Mentor and develop engineers and designers.
• Provide technical oversight and line management where required.
• Build relationships with clients, suppliers, stakeholders and project teams.

Skills

Technical leadership

Discipline coordination

Mentoring

Client liaison

Design reviews

Line management

Engineering standards

Project delivery

Education

Degree in Civil Engineering

Chartered Engineer (CEng)

Tools

NEC contracts

Job description

Principal Design Engineer

Location: Glasgow

Contract Type: Permanent | Full Time

We have a Principal Design Engineer opportunity with a leading Tier 1 contractor delivering major infrastructure and non-infrastructure projects across the UK water sector. The role focuses on the design and delivery of water and wastewater schemes, including pipelines, pumping stations, treatment facilities, and associated civil engineering assets.

You will:

• Provide technical leadership across multidisciplinary water and wastewater projects.
• Deliver high-quality engineering solutions alongside Design Managers, Discipline Managers, Design Leads, and Principal Engineers.
• Act as a technical authority, resolving complex engineering challenges and driving technical excellence.
• Ensure designs meet relevant standards, regulations, client requirements, and project objectives.
• Provide governance and technical assurance across your discipline.
• Coordinate with other engineering disciplines to support integrated project delivery.
• Support procurement, construction, commissioning, and site teams with technical expertise.
• Drive innovation, continuous improvement, and engineering best practice.
• Mentor and develop engineers and designers.
• Provide technical oversight and line management where required.
• Build strong relationships with clients, suppliers, stakeholders, and project teams.

About You

• Degree qualified in Civil Engineering or a related discipline, or equivalent qualification.
• Significant experience within the municipal water and wastewater sector.
• Chartered Engineer (CEng) or working towards chartership.
• Experience within a contractor, consultancy, or design-and-build environment.
• Strong knowledge of water and wastewater assets, including buried and above-ground systems, treatment processes, inlet works, settlement tanks, final effluent systems, chambers, and associated civil structures.
• Strong understanding of health and safety legislation, British Standards, and industry regulations.
• Experience working within quality assurance and health and safety management systems.
• Ability to review and approve engineering calculations, reports, specifications, and design documentation.
• Experience undertaking hydraulic calculations and assessments.
• Knowledge of structural design for water-retaining structures and reinforced concrete detailing.
• Experience leading technical discussions with clients and developing engineering solutions.
• Experience leading design reviews, progress meetings, and site meetings.
• Working knowledge of NEC contracts.
• Understanding of quality, environmental, and health and safety management systems.
• Strong communication and technical report-writing skills.
• Proven ability to lead teams and deliver projects to programme and budget.
• Experience coordinating suppliers, subcontractors, construction teams, and internal stakeholders.Understanding of design planning, resource allocation, and programme management.
• Experience working within multidisciplinary teams.
• A passion for mentoring and developing engineers.

This is an excellent opportunity to join a leading Tier 1 contractor at the forefront of the UK water industry. You will play a key role in delivering critical water infrastructure projects while helping shape engineering standards, innovation, and future talent within a collaborative and supportive environment.