Eligibility for ACS Assessments


Potential candidates are split into three categories. Prerequisites to attend assessment will be dependent upon which category an operative falls into.The following sections provides guidance on who qualifies for which category but we are happy to provide further information and advice on these requirements.

Category One

Applicants who are experienced gas fitting operatives from within or outside the United Kingdom and who who are one or more of the following would be considered Category One.

  • Seeking to renew expiring or expired certificates of gas safety competence, i.e. ACOP, ACS or Gas Services N/SVQs
  • Seeking assessment and certification to extend their range of gas work.
  • Foreign nationals seeking to obtain certificates of gas safety competence enabling them to meet UK gas work requirements. Operatives in this category must present evidence of their gas fitting qualifications and experience to the Assessment Centre.

Category One - Application Requirements

Applicants applying for Initial or Reassessment must present to the Assessment Centre original appropriate certificates of gas safety competence.

The applicant must declare whether they:

  • Are registered with the Gas Safe Register as a self employed operative or an employee of a Gas Safe Register employer
  • Are not recognised or covered by Gas Safe Register registration scheme.

Category Two

Applicants must provide evidence that they hold qualifications relevant to the area of gas work they are seeking to obtain certification in. These qualifications must have enabled competence to be demonstrated in the generic work activities associated with fossil fuelled appliances/equipment and/or pipework installation,

including any of the following work activities, flueing or ventilation or the installation, maintenance or commissioning of such appliances. Applicants must present evidence to the Assessment Centre prior to the commencement of assessment.

Examples of appropriate qualifications include:

  • Plumbing craft qualification or N/SVQ (oil and/or solid fuel options) suitable initially for domestic or commercial central, water-heating or pipework installation.
  • Pipefitter/welder craft qualification or N/SVQ suitable initially for commercial pipework, pipework commissioning and meter installation.
  • Heating and Ventilation craft qualification or N/SVQ suitable initially for commercial pipework and appliance installation.
  • Refrigeration Engineer/Fitter craft qualification or N/SVQ suitable initially for commercial appliance and pipework installation.

Additionally applicants in this category must provide written evidence to the Assessment Centre confirming that they have undertaken ‘on the job’ gas installation and/or maintenance training and have experience of gas work that has been carried out under the direct supervision of a competent operative(s) employed by a Gas Safe registered business that would support their application for the range of assessment to be undertaken.

This evidence must be in writing from the employer detailing precisely the areas of gas work previously carried out.

Applicants that do not satisfy the criteria of Categories 1 or 2 will be classified as a new entrant to the industry.

Category Two - Application Requirements

Applicants with relevant qualifications and experience must declare whether they have:

  • Had a gas competency certificate or qualification withdrawn in the past.
  • Been deemed incompetent in the past in matters of gas safety and if so provide details for review by the Certification Body. (The Certification Body will make a decision about the application after a full review of the circumstances and keep a record of the findings and the decision for six years.)

Category Three

An applicant in this category will not be able to provide acceptable evidence of relevant qualifications and gas work experience. Therefore the application is not acceptable.

Individuals in this category should be advised to seek training and experience which will result in attainment of National/Scottish Vocational Qualification (N/SVQ) in Gas Services, Installation and Maintenance at Level 2 or 3 to obtain employment with a Gas Safe registered business who are willing to provide an auditable extended period of company ‘in house’ gas training programme and organisational support to the operative prior to taking ACS assessment. The duration and content of the training programme will be determined by the scope of gas work to be undertaken. Evidence in the form of a portfolio of the completion of such a training programme must be presented to the Assessment Centre prior to the operative taking assessments.

Alternatively an N/SVQ within the Mechanical Engineering Sector with related on the job gas training and experience in the intended areas of gas work to be carried out will also support a future application.

Gastec Training

Gastec Training and Assessment Centres is a leading supplier of training and assessment services to the utilities industries. We  offer the full portfolio of training and assessment services for the entire utilities sector including the Gas Safe register.

Gas Courses

We have developed a full and varied range of courses designed to suit all personnel in the gas industry. The courses and assessments cover all areas of domestic and commercial servicing and installation procedures. We are constantly working to develop new courses to meet the ever-changing innovations and legislative needs of the gas industry.

Electrical Courses

At Gastec we provide structured modular training for the electrical industries that require either compliance or mandatory training and assessments together with a recognized qualification.

Oil Courses

The OFTEC series of courses includes courses for equipment installers in both the domestic and commercial oil sectors

Solid Fuel Courses

We have new courses ideal for those new to the sold fuel sector or experienced operatives seeking to widen their skills.  The range of courses include such areas as its delivery,  storage, relevant technologies and appliances.

A New Career Direction ?

We offer a range of courses for new entrants with no experience of the utilities sector. Courses are available in all the major utility sectors.

New Entrants

Industry Expertise ?

If you are an experienced technician in the utilties sector but wish to broaden your skill set we have a range of conversion courses available

Conversion Courses

A New Career Direction ?

We offer a range of courses for new entrants with no experience of the utilities sector. Courses are available in all the major utility sectors.

Industry Expertise ?

If you are an experienced technician in the utilties sector but wish to broaden your skill set we have a range of conversion courses available

Gastec Training - Main Menu
About Gastec

Gastec is a leading supplier of training and assessment services to the utilities industries with gas,electrical, oil, plumbing and solid fuel courses.

Choosing a Training Provider

We offer courses for new entrants, those looking to broaden their skill-set or experienced operatives looking to update their qualifications.

Booking a Course

We have an expert team waiting for your call with specialists in new entrant training as well as assessments and re-assessments for experienced operatives.

Central Location

Gastec is located close to the centre of Milton Keynes and only 10 minutes from Junction 13 of the M1 offering easy access from the major transport routes.

Electrical Pylon

First Steps

Get an overview of the steps you need to take to forge a new career in the lucrative utilities sector.

What questions you should be asking, what training you need and how to plan your training.

Gas ring


Do you want to be your own boss, work hours that suit you and do interesting, and challenging work?

If you want to make a good living the gas sector is a good first choice with many opportunities.

Oil pump


There is a continuing demand for OFTEC qualified heating oil operatives within the utility sector

If you would like to work in this sector on a range of oil installations find out about our New Entrant oil courses.

Electrical wires with spark


Are you considering a career move and are excited by the thought of a career as an electrician?

The New Entrant training course takes you from complete novice to accredited electrician.

Cover of booklet

New Entrant Guide

The Gastec New Entrant Guide provides detailed information on our New Entrant courses.

It also includes further information on the full range of training courses available from Gastec

Gas Ring


We offer a comprehensive range of gas courses for experienced operatives wishing to develop their skills or cross train into new areas.

Our courses cover domestic, commercial, and LPG applications as well as cross training courses between industry sectors

Oil Burner Pump


At Gastec we know the busy working engineer must remain compliant at all times with the current regulations and OFTEC standards

Our structured training courses for operatives in the oil sector provide training and assessments to OFTEC standard.

Electrical wires


We offer a range of courses for the busy working engineer who needs to remain compliant with current regulations and standards.

If you work in this sector find out more about our structured, modular training courses offering a recognised qualification.

Wall mounted boiler


If you want to remain up to date with the current regulations we offer a range of training and assessments to ensure full compliance

We offer practical hands on courses for plumbers. These provide operatives with a practical skills and knowledge of the regulations.

Burning log fire

Solid Fuel

Our solid fuel courses provides a pathway to a career in solid fuel including the basic principles and technologies of solid fuel appliances.

If you are interested in a greater understanding of modern solid fuel, its delivery, technologies and appliances contact Gastec

Man fixing boiler

ACS Certification

A fulfilling career in the gas sector is on offer for those committed to developing their skillset by training and accreditation

ACS or Accredited Certification Scheme ensures that gas operatives are assessed to prove their competence in gas safety.

Lit gas ring


Candidates are split into three categories. Prerequisites to attend assessment are dependent on the category an operative falls into.

The exact category will depend on a range of factors based on past experience and prior accreditation and assessments

Gas cooker range


To work on gas installations all operatives must demonstrate that they are competent to do so. ACS Accreditation is how they do this

New operatives or experienced technicians seeking to work in new applications will need to undertake the assessment process.

Gas range in restaurant


A shortened ACS Re-Assessment is available to operatives who hold an in-date ACS qualification for their application speciality.

Operatives wishing to widen their skillset to new application areas such as catering would need to take a full assessment

Logos of British Armed Forces
Exciting Career Choices

The utilities sectors offers a range of choices in terms of specialities and qualifications for anyone leaving the armed forces seeking a new career

New Entrant Courses

If you are new to the utilities sector we can offer advice on the most cost effective way to train and get accredited for a new lucrative career

Hand Working on fuse box
Develop Your Training Plan

We have an expert team waiting for your call with specialists experienced in helping ex-armed forces personnel plan their training needs.

Enhanced Learning Credits

At Gastec are proud to be able to offer Service Leavers the chance to claim their ELC entitlement and use on a majority of Gastec’s Courses.

Logos of British Armed Forces
Work at Gastec

We offer a range of employment opportunities for experienced personnel wanting to work in a training role.

Experienced Personnel

We look for personnel who combine experience of the utility sector and an understanding of the regulatory framework.

Boiler Gas Jets
ACS Assessors

We welcome your application if you have experience of ACS Assessment with in domestic and commercial assessments.

Does This Sound Like You ?

Contact the team at Gastec if you would like to find out more about taking your career in the utilities sector to the next level.

Map of Milton Keynes

Gastec is located close to the centre of Milton Keynes and only 10 minutes from Junction 13 of the M1 offering easy access from the major transport routes.

Hotel Reception

There is a wide range of accommodation available close to our training centre in Milton Keynes. These include locations to suit all needs and budgets.

Local Restaurants

Milton Keynes has a wide range of restaurants. This includes major chains, independent venues with a choice of menus to suit all dietary needs and budgets.

WWW Logo
External Resources

We have listed information on a range of external sites which we think will be of interest to our customers and help them in the development of their career.