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Water Compliance Engineer / Authorised Person (AP)

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Overview of the role

Whether you are specialising in Fire & Security, Electrical, Mechanical, or Systems Engineering, your role at G4S is about precision and reliability. You will be responsible for the installation, maintenance, and technical support of critical assets that keep our communities and businesses operational and secure.

Joining G4S means joining a team where your technical expertise directly contributes to the safety and security of the places we work and live.

Core responsibilities

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Problem solving

Diagnosing complex technical faults and identifying the most efficient, long-term solutions while adhering to strict SLAs and KPIs.

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Compliance & Safety

Working to the highest Health & Safety standards, ensuring all works meet regulatory requirements and site-specific policies.

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Documentation

Maintaining accurate, real-time technical records and reports via PDA or service management systems to provide transparency to our clients.

Water Compliance Engineer / Authorised Person (AP)

Leiston, United Kingdom

Job ID : 11202
Job category : Facilities Management
Location : Leiston, United Kingdom
Date posted : 10/09/2026
Closing date : 23/11/2026

Water Compliance Engineer / Authorised Person (AP)

Salary: £45,000 per annum

Hours: Permanent, Full-time,40 hours per week, Monday - Friday (08:00-17:00)

Sizewell C, Leiston, Suffolk, IP16 4UR

About the Job

G4S Facilities Management are looking for a Water Compliance Engineer / Authorised Person (AP) to join our team at Sizewell C.

Reporting directly to the Compliance Manager, you will serve as the lead Subject Matter Expert (SME) and Water Authorised Person (AP), driving operational excellence, compliance, and safety across the G4S Facilities Management contract at Sizewell C.

In this dynamic hands-on role, you will take true ownership of site water management managing processes, logbooks, and Written Schemes while delivering expert technical guidance to both internal leadership and the client. Beyond compliance, you will act as a key leader on site: overseeing specialist subcontractors, driving operational governance, representing G4S at Water Safety Groups, and mentoring site personnel. If you're looking for a hands-on technical role where you can take full ownership of water compliance on a flagship infrastructure project, we'd love to hear from you. 

Key Responsibilities:

Technical Authority & Subject Matter Expertise

  • Act as the Water AP and Subject Matter Expert (SME) for G4S FM at Sizewell C, providing comprehensive advice on all water safety matters to management and the client.

  • Monitor legislative updates, guidance, and industry best practices to ensure continuous compliance across the contract. 

Governance, Processes & Risk Management

  • Own and maintain all water management processes, procedures, logbooks, and Written Schemes.

  • Review water risk assessments, ensure actionable closeouts, and oversee sampling frequencies, monitoring results, and adverse findings.

  • Execute oversight and assurance activities across operational teams to enfore established water standards. 

Operational Support and Solutions

  • Work directly with field teams to resolve site water challenges by developing practical solutions and mitigation controls.

  • Lead performance management and liaison with specialized water management subcontractors. 

People Leadership & Mentorship 

  • Maintain competency logs and perform checks for Responsible Persons (RP) and Deputy RPs. 

  • Identify training needs, deliver specialized development programs, and mentor personnel involved in site water management. 

Stakeholder Management & Reporting

  • Build strong relationship across internal teams, the SZC Client, contruction contractors, and 3rd-party supppliers. 

  • Respresent G4S FM at Water Safety Groups and client meetings. 

  • Collaborate with Health & Safety/Compliance teams to publish monthly performance reports that drive continuous improvements. 

What we're looking for: 

Essential:

  • Demonstrable working experience with HSG274 (Part 2) and HSE Approved Code of Practice L8 ACoPs.

  • Strong FM background  with high professional standards and solid knowledge of statutory compliance regulations and SFG20.

  • Level 3 qualified in at least one technical discipline. 

  • Strategic Planning and Project Management skills. 

  • Strong verbal and written communication skills, and strong interpersonal skills. 

  • IT literate.

  • Ability to build a strong working relationships with internal and external stakeholders. 

  • Meticulous attention to details and strong Customer focus. 

Desirable:

  • Experience on large-scale infrastructure projects. 

  • Experience of CAFM / Concept Evolution. 

  • IOSH or NEBOSH qualifications. 

Benefits:

While working for G4S, you are entitled to a number of benefits and offers from G4S partners and other organisations, from employee assistance provided through SPARK, to RAC cover and so much more, including the below:

  • 20 days holiday plus bank holidays.

  • Progression, training and development catered to you. 

  • Refer A Friend incentives. 

  • Company pension scheme with employee contributions. 

  • G4S Life Assurance Scheme. 

  • Subsidised healthcare plan. 

  • Charity work-Match-IT and Payroll Giving. 

  • Confidential Counselling Services. 

  • 24/7 support specialising in health and medical. 

  • Disocunts on high street shops and brands including several leading high street brands, retailers and travel suppliers. 

G4S is the International business of Allied Universal, the world's leading security and facility services provider and trusted partner to more than 400 of the Fortune 500. Allied Universal delivers unparalleled customer relationships, innovative solutions, cutting-edge smart technologies and tailored services that enabled clients to focus on their businesses. With operations in over 100 countries and territories, Allied Universal is the third largest employer in North America and seventh in the world. Annual revenue is approximately $23 billion. There is no greater purpose and responsbility than serving and helping to safeguard customers, communities and people. For more information, visit g4s.com. In the UK, the company has an extensive network of offices and more than 31,000 employees. 

Ready to embark on a new journey? 

Applications take less than 2 minutes. Click 'Apply Now' to submit your details, and our Recruitment Team will be in touch.

#LI-RG1


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Success profile

It takes someone special to be a G4S Engineer. We are looking for engineers who take pride in their craft and are committed to continuous learning. Our successful engineers share these core traits:

  • Technical excellence
  • Analytical mindset
  • Adaptability
  • Quality focused
  • Strong communication skills
  • Reliable

Career path

As a G4S Engineer, you are part of a global team that values your technical expertise. Our Engineering positions offer a range of opportunities to support the personal and professional development of our teams. We invest in your technical growth, providing the pathway for you to move from a specialist technician into senior operational leadership.

Engineer/ Technician Lead Engineer/ Qualifying Supervisor Technical Operations Manager Account/ Contract Manager Head of Engineering/ Regional Director

Rewards and benefits

Our benefits vary from country to country and role to role and are designed to ensure our staff have access to the things they need to thrive both in and out of work. This includes on-the-job training, career paths to management and a range of benefits depending on locations around the world.

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Training & Development

We continually invest in the training and development of our employees so that they can reach their full potential.

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Rewarding compensation

Competitive base salary with opportunities for overtime and on-call allowances.

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Promote from within culture

At G4S we pride ourselves on fostering a promote from within culture.

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