Security Industry Authority Approved Contractor Scheme

What is the SIA ACS?

The SIA ACS (Security Industry Authority Approved Contractor Scheme) is the only recognised scheme to standardise organisations operating within the private security sector.

The standard was designed by members of the security industry in consultation with the Private Security Industry Act 2001. The SIA ACS includes elements of widely recognised business improvement models including ISO 9001 and the European Foundation for Quality Management Excellence Model. The scheme therefore proves not only your competency in security practices, but also demonstrates your continued investment in improving your operational efficiency.

Why get SIA ACS approved?

Your potential clients are increasingly making SIA ACS approval mandatory for their security service providers. So, while the scheme is voluntary, achieving SIA Approved Contractor Scheme status strengthens your position in the private security industry and can improve your eligibility.

Advantages of becoming an SIA approved contractor

  • Demonstrates that your service has been independently assessed against recognised standards and that security personnel have been properly trained for the role they will perform

  • Provides a competitive edge over others in the market and gives confidence in the service you will provide

  • Gives you entry to the SIA Register of Approved Contractors emphasising your status as one of the strongest providers of private security services available in the UK 

  • Display the approved contractor plaque and/or certificate at your premises

  • Add the relevant standards to your vehicle markings, social media and web pages

  • Purchase additional certificate copies for use during acquisition of new clients or for distribution to existing clients

  • Displaying the standard assures your customers, partners and employees of your position as an exemplary private security service provider

Why choose Alcumus ISOQAR?


Dave Daulby, Compliance Manager at Axis Security:

"I have used the services of several awarding bodies over the years and can therefore say with some authority that Alcumus ISOQAR is by far the best and our number one choice."

Iain McCallister, Managing Director of MAN Commercial Protection Ltd:

"We as a company have increased our turnover significantly during the last few years and a big part of that has been with the accreditations won and the assistance of Alcumus ISOQAR and their auditors."

  • Official SIA ACS assessor since 2006

  • Completed thousands of assessments for hundreds of clients

  • Over 90% of our clients renew their SIA Approved Contractor Scheme membership with us every year

  • Our established assessment process has been refined and is continually improved to ensure an efficient and accurate method

  • Continually analysed pricing strategy that is tailored to your requirements

  • Dedicated technical customer service teams

Already ACS approved? Transfer to Alcumus ISOQAR now

Transferring your existing approved status to Alcumus ISOQAR is as straightforward and as easy as switching your energy provider. During the transfer process (ACS Standard Route) we will pick up your case where your current provider left off, and continue with your agreed schedule.

Step 1:  Call us on 0161 866 6186 for a no-obligation review of your needs

Step 2: Send us your application, current certificate and last visit report

Step 3: We send you a quote and, once confirmed, we'll notify the SIA of your intent to transfer

Step 4: We then verify your existing approval and management system 

Step 5: We take over your approval visits and carry out the assessments in line with your previous schedule to ensure you maintain ACS status