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Semi Skilled Engineer

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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.

Semi Skilled Engineer

Milton Keynes, United Kingdom

Job ID : 18920
Job category : Facilities Management
Location : Milton Keynes, United Kingdom
Date posted : 26/08/2026
Closing date : 09/09/2026

Semi Skilled Engineer

G4S Care and Rehabilitation Services

Oakhill Secure Training Centre, Oakhill, Milton Keynes, MK5 6AJ

Salary : £35,389.06 per annum

Permanent - Full Time (40 hours per week)

Benefits: Company Pension, free on-site parking, uniform, on-site canteen, access to High Street Shop discounts and ongoing training and development

 

At Oakhill Secure Training Centre we look after young people aged 12 to 18 years old who have been remanded or sentenced to periods of detention. The vulnerable young people in our care can be challenging with a wide range of social and emotional complex needs. This is an environment that calls for high standards of social care and service delivery to provide a secure and stable environment for young people to develop their life skills and address the behaviours that have led them into custody. 

 

Oakhill Secure Training Centre works closely with the Youth Custody Services to ensure that its regimes and designs reflect best practice in residential care to prevent offending.

 

We are looking for a Semi Skilled Engineer with experience of building and facilities maintenance to work as directed across a range of disciplines to maintain and repair assets, building fabric, services and utilities across the Secure Training Centre that is the responsibility of the G4S FM Team.

 

Some of the Key Responsibilities are;

  • Operate within planned maintenance procedures for assets etc, effectively and safely within their range of qualifications, levels of competence, training and experience.
  • Deal effectively and safely with breakdowns and damage to assets etc. within their range of qualifications, levels of competence, training and experience as required and by out of hours response where necessary.
  • Write up maintenance reports and technical procedures for Building Maintenance Activities.
  • Assist in the training and development of other maintenance/technical staff involved in site maintenance activities.
  • Carry out maintenance inspection and repairs to various types of heating, water, ventilation, mechanical equipment and services on site, where necessary and within their range of qualifications, levels of competence, training and experience
  • Diagnosing faults on all mechanical support systems and rectifying where necessary and within their range of qualifications, levels of competence, training and experience.
  • Following detailed drawings and operational maintenance manuals in order to carry out all planned maintenance, routine inspections and reactive repairs.
  • Carry out maintenance inspection and repairs to various assets, building fabric throughout the secure training centre, e.g. furniture, internal /external fixtures and fittings, grounds, access and car parking, etc.
  • Assisting in the development of maintenance routines, procedures, risk assessments, preparing and maintaining relevant technical records. 
  • Working with other craft qualified, semi-skilled and non-skilled maintenance staff to develop cross-skilling and cover all levels and aspects of maintenance activities on a team work basis.
  • Participate in emergency call out arrangements and provide cover where necessary during sickness absence periods.
  • Carry out maintenance activities to assist in project and improvement development works, offering alternatives to improve the effectiveness of the operation of the site, review current legislation / regulations within their range of qualifications, levels of competence, training and experience.
  • Assist in the promotion of creating a positive Health & Safety culture across the site leading by example, this includes reporting accidents and near misses in a timely manner & follow the applicable safe systems of work for the role.
  • The duties and responsibilities listed within this job description are not exhaustive and the job holder is expected to accept reasonable alterations and additional tasks of a similar level that may be necessary from time to time.

You must have experience of building and facilities maintenance and be able to work as part of the onsite FM team.

 

The following are desirable but not essential;

  • HVAC systems experience,  equipment maintenance,
  • A/C repairs & maintenance.
  • Legionella & WRAS Controls and regulations.
  • Experience of BMS systems.

 

At G4S, we invest heavily in our people.  If you join us you will have a job specific induction programme to equip you with the skills and knowledge for the job. As well as ongoing support and development opportunities we offer generous holiday entitlement, company pension, an onsite gym, free onsite parking and the chance to do an extraordinary job – every day.

 

For more information on Oakhill Secure Training Centre please visit, https://oakhillstc.co.uk/

 

Equality and Diversity is an important part of G4S Care and Rehabilitation Services. We actively encourage applications from all backgrounds and are a fully inclusive employer who aims to support all employees to be their true selves. We are happy to discuss any reasonable adjustments for either the role or during the recruitment process

 

G4S Care and Rehabilitation Services is committed to safeguarding and promoting the wellbeing of children and adults at risk and each employee is expected to support these goals.

 

Safeguarding children and young people is our primary focus and the welfare of the child is paramount. Therefore we have a corporate responsibility to ensure that the safeguarding and our G4S values are at the centre of all we do.​

 

To apply for this role, you must be eligible to work in the UK and must have been resident in the UK for a minimum of 5 years.   This role is subject to safer recruitment practices including a DBS enhanced level security clearance and will need to provide full details of your work and educational history covering the last 10 years as part of the screening process for the role.

 

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 enable clients to focus on their core businesses. With operations in over 100 countries and territories, Allied Universal is the third largest private employer in North America and seventh in the world. Annual revenue is approximately $23 billion. There is no greater purpose and responsibility 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.

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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.

More about G4S