Senior Water Engineer
| Posting date: | 17 March 2026 |
|---|---|
| Salary: | £38,000 to £45,000 per year |
| Hours: | Full time |
| Closing date: | 16 April 2026 |
| Location: | London, UK |
| Remote working: | On-site only |
| Company: | ISS Facilities Services |
| Job type: | Permanent |
| Job reference: | 153313 |
Summary
Senior Water Engineer
Contract: Key Account Network
Location: London (mobile role), covering Greater London, the South East and the South Coast
Hours of work: 40
Contract Type: Permanent
We are seeking a skilled and experienced Senior Water Engineer to deliver a wide range of planned maintenance, compliance, and servicing activities across commercial and domestic water systems.
This role plays a crucial part in ensuring clients remain compliant with L8 ACOP legislation while receiving high-quality technical support and water hygiene services.
Job Description
We are looking for someone confident working on complex water systems, who can carry out surveys, produce quotes, and undertake both standard and specialist remedial tasks.
You will contribute to service delivery improvements, mentor junior colleagues, and act as a technical expert within the water hygiene and treatment discipline.
Key Responsibilities
Deliver surveys, quotations, and practical delivery of L8, remedial works, RPZ, and flushing activities across various sites.
Perform scheduled inspections, preventative and corrective maintenance, testing, and troubleshooting on water system equipment in line with plumbing codes and manufacturer instructions.
Complete reactive disinfection procedures on domestic and commercial systems in line with ISS UK&I Governance and SSoW documentation.
Carry out standard PPM monitoring and inspection tasks as required by customer CAFM systems or via direct request.
Survey, quote, and undertake all water hygiene and water treatment remedial works in accordance with customer requirements.
Attend technical forums and community meetings as requested.
Support service delivery improvements and mentor junior team members.
Determine appropriate methods, techniques, and materials needed to complete assigned tasks effectively.
Provide detailed reports for all tasks undertaken and issue certification for small works.
Professional and Personal Competencies/Qualifications
Specialist water treatment engineering experience.
Core plumbing qualification: NVQ Level 2 or above (additional qualifications beneficial).
Experience and certification in water system disinfection, including nondomestic and utilities environments.
Strong knowledge of water regulations.
Experience in general water hygiene PPM activities.
Full UK driving licence (essential).
Ability to set high standards, show responsibility for work, and demonstrate respect for colleagues and clients.
Strong time-management and prioritisation skills.
The Company
ISS is a world-leading workplace and facility management company, connecting people and places to make the world work better. Working with customers day by day, side by side, we understand every aspect of the user experience.
Through a unique combination of intelligent solutions, high standards and people who care, to help our customers achieve their purpose, whether it’s hospitals healing patients, businesses producing the next great innovation, or airports bringing passengers home to their families. ISS is committed to doing business the right way, taking its corporate responsibility very seriously. Our passion is people.
We offer you a challenging and exciting career in an organisation with people at its heart. In ISS, everyone has the opportunity to develop, grow and make a difference. #Becomewhoyouwant #Bepartofsomethingbigger
#aplacetobeyou #facilitiesmanagement
ISS is proud to be a diverse and inclusive employer.
ISS welcomes all applicants regardless of age, disability, gender identity or gender reassignment, marital or civil partnership status, pregnancy or maternity, race (which includes race, colour, nationality, ethnic or national origin and caste), religion or belief, sex, sexual orientation or educational background.
We are a Disability Confident Committed (Level 2) employer, proudly supporting and promoting inclusive hiring practices in line with the UK government’s Disability Confident scheme.
Our passion for inclusivity and diversity makes ISS a more creative, productive and happy place to work.
If you have any further queries regarding this role, please contact the Resourcing Team by emailing resourcing.team@uk.issworld.com
Contract: Key Account Network
Location: London (mobile role), covering Greater London, the South East and the South Coast
Hours of work: 40
Contract Type: Permanent
We are seeking a skilled and experienced Senior Water Engineer to deliver a wide range of planned maintenance, compliance, and servicing activities across commercial and domestic water systems.
This role plays a crucial part in ensuring clients remain compliant with L8 ACOP legislation while receiving high-quality technical support and water hygiene services.
Job Description
We are looking for someone confident working on complex water systems, who can carry out surveys, produce quotes, and undertake both standard and specialist remedial tasks.
You will contribute to service delivery improvements, mentor junior colleagues, and act as a technical expert within the water hygiene and treatment discipline.
Key Responsibilities
Deliver surveys, quotations, and practical delivery of L8, remedial works, RPZ, and flushing activities across various sites.
Perform scheduled inspections, preventative and corrective maintenance, testing, and troubleshooting on water system equipment in line with plumbing codes and manufacturer instructions.
Complete reactive disinfection procedures on domestic and commercial systems in line with ISS UK&I Governance and SSoW documentation.
Carry out standard PPM monitoring and inspection tasks as required by customer CAFM systems or via direct request.
Survey, quote, and undertake all water hygiene and water treatment remedial works in accordance with customer requirements.
Attend technical forums and community meetings as requested.
Support service delivery improvements and mentor junior team members.
Determine appropriate methods, techniques, and materials needed to complete assigned tasks effectively.
Provide detailed reports for all tasks undertaken and issue certification for small works.
Professional and Personal Competencies/Qualifications
Specialist water treatment engineering experience.
Core plumbing qualification: NVQ Level 2 or above (additional qualifications beneficial).
Experience and certification in water system disinfection, including nondomestic and utilities environments.
Strong knowledge of water regulations.
Experience in general water hygiene PPM activities.
Full UK driving licence (essential).
Ability to set high standards, show responsibility for work, and demonstrate respect for colleagues and clients.
Strong time-management and prioritisation skills.
The Company
ISS is a world-leading workplace and facility management company, connecting people and places to make the world work better. Working with customers day by day, side by side, we understand every aspect of the user experience.
Through a unique combination of intelligent solutions, high standards and people who care, to help our customers achieve their purpose, whether it’s hospitals healing patients, businesses producing the next great innovation, or airports bringing passengers home to their families. ISS is committed to doing business the right way, taking its corporate responsibility very seriously. Our passion is people.
We offer you a challenging and exciting career in an organisation with people at its heart. In ISS, everyone has the opportunity to develop, grow and make a difference. #Becomewhoyouwant #Bepartofsomethingbigger
#aplacetobeyou #facilitiesmanagement
ISS is proud to be a diverse and inclusive employer.
ISS welcomes all applicants regardless of age, disability, gender identity or gender reassignment, marital or civil partnership status, pregnancy or maternity, race (which includes race, colour, nationality, ethnic or national origin and caste), religion or belief, sex, sexual orientation or educational background.
We are a Disability Confident Committed (Level 2) employer, proudly supporting and promoting inclusive hiring practices in line with the UK government’s Disability Confident scheme.
Our passion for inclusivity and diversity makes ISS a more creative, productive and happy place to work.
If you have any further queries regarding this role, please contact the Resourcing Team by emailing resourcing.team@uk.issworld.com
Proud member of the Disability Confident employer scheme
Disability Confident
About Disability Confident
A Disability Confident employer will generally offer an interview to any applicant that declares they have a disability and meets the minimum criteria for the job as defined by the employer. It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people. For more details please go to Disability Confident.