Hi, I'm Marcus Gwilliam.

Welcome to MG IT Security Ltd.


For the past 15 years I've worked in various IT Security roles, including for some of the largest UK based regulated financial service companies. I have a proven track record of delivering security accreditations and compliance including ISO27001, PCI-DSS v4, CSA Star and Cyber Essentials Plus.


On this website you can learn more about me and how I would be able to help improve your companies IT Security posture and achieve different accreditations that would help win new business. I've also included testimonials that I've received from clients I've worked with.


If you're interested in working with me then I would be pleased to hear from you. There are three key services I provide:


  • Firstly, I provide IT Security Consultancy Services to SME companies looking to improve their IT Security posture.

  • Secondly, I conduct risk assessments for companies to fully understand and mitigate any potential risks that a new project might introduce.

  • Finally, I'm able to work with your company to help deliver security accreditations and compliance including ISO27001, PCI-DSS v4, CSA Star and NCSC Cyber Essentials or Cyber Essentials Plus.

I'm really proud that throughout my career I have established long-standing working relationships and have received lots of positive feedback.


"I've helped many companies improve their IT Security posture which has resulted in receiving positive feedback"


Premier Choice Group


"I can honestly say that nothing is too much trouble for Marcus, he always put's our needs before his own! I could go on and on praising Marcus for the way he is. He really is the type of person who would not let you down, and that I feel is a very rare thing to find now-a-days."



Paragon Porsche


"We would thoroughly recommend Marcus, he is very likeable, courteous and a happy sould to have in the workplace."



JP Tupper Associates


"Since contracting you to look after our systems and implement upgrades we have all been delighted with both the speed and depth of knowledge you clearly have. Marcus, I would highly recommend you to any other professional company looking for a highly experienced and skilled IT service."



More About Me


My professional 9-5 career has seen me employed in various IT Security and Cyber Security roles for over 15 years.


I've worked within different industries including banking, travel, insurance, marketing and motorsports. From my career I've gained experience of working with both SME business owners and C-Level executives alike.


I'm really proud to have established long-standing working relationships with everyone I've worked with and I feel the feedback I've received demonstrates that.


Some of my key achievements include:


  • Working as an IT Security Consultant to achieve ISO27001 certification for a leading financial services company.

  • Achieving PCI-DSS V4 Compliance.

  • Achieving Cyber Essentials Plus Certification Twice.

  • Achieving CSA Star Certification.

  • Achieving Lloyds of London Security Compliance For Insurance Purposes.

  • Successfully Defending From A Real Cyber Security Attack With No Internal, External or Client Data Compromised.


In my free time I enjoy endurance sporting events and have completed various marathons and Ironman Triathlon events. My best achievement was finishing 3rd in a race in California.



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To see how I could help your IT Security improve please contact me for a free initial IT Security consultation




Contact Me

I will respond to all emails within 24 hours.




MG IT Security Ltd. 71-75 Shelton Street, Covent Garden, London, United Kingdom, WC2H 9JQ

[email protected]