Senior Water Process Engineer & Associate Director (Hybrid)

Ayesa; Greater London; Hybrid; GBP 110,000 - 180,000; Full time

Benefits offered by this job

Hybrid working

Employer Pension Match Scheme

Income protection

Life assurance

Training and development programme

Family & well-being support

Sports and social

25 days annual leave

Job summary

Ayesa is seeking a Lead Process Engineer – Associate Director to join its Water Infrastructure Team in London. You will lead process design for water treatment facilities, coordinate with civil, mechanical, electrical, and control disciplines, and drive projects from concept to commissioning.

You will mentor engineers, engage clients to shape proposals, and promote sustainable, digital design practices across projects.

Qualifications

• 10+ years’ experience in water, wastewater, or industrial effluent design.
• Chartered Engineer (CEng) status or equivalent.
• Degree in Chemical, Process, or Environmental Engineering (Master’s desirable).

Responsibilities

• Lead process design for water and utility systems.
• Define process schemes, mass balance, hydraulic profiles and calculations.
• Ensure compliance with UK regulations and client requirements (DWI, EA, Ofwat, BSI, WIS, IGN, SuDs).
• Coordinate across civil, mechanical, electrical, and control disciplines.
• Develop and manage PFDs, P&IDs, and design reports and specifications.
• Provide technical leadership and mentorship to engineers and graduates.
• Engage directly with clients to shape solutions and bids.
• Promote innovation, sustainability and digital best practices.

Skills

Process design leadership

HAZOP/HAZID leadership

Client engagement

Multidisciplinary coordination

UK regulatory compliance

Sustainability & digital practices

Education

CEng Chartered Engineer

Master’s degree in Chemical/Process/Environmental Eng

Bachelor’s degree in Chemical/Process/Environmental Eng

Tools

BIM

PFDs & P&IDs

Process calculations

Job description

Ayesa is seeking a Lead Process Engineer – Associate Director to join its Water Infrastructure Team in London. You will lead process design for water treatment facilities, coordinate with civil, mechanical, electrical, and control disciplines, and drive projects from concept to commissioning.

You will mentor engineers, engage clients to shape proposals, and promote sustainable, digital design practices across projects.