The Engine Room

A range of approachable industry experts are always available to help you with any request. Meet our management team below

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John Davies

Co-Founder/Managing Director

I’ve worked within the telecoms sector for over 21 years and I co-founded BluGem in 2005 where I patented the first real-time test call generator solution. I graduated with a 2.1 Business Information Technology degree and achieved various IT qualifications including a certified ISEB software tester.

At BluGem I continue to invest and develop the business and we have an experienced and driven management team so our products are innovative and we adapt to the dynamic and fast paced telecoms industry.

Chris Vanstone

Software Development Manager

With nearly 15 years industrial software development experience, I have been leading the in house development team at BluGem for over 9 years.  I have worked in a variety of industries including security, semi-conductors and telecommunications following obtaining an MEng in Cybernetics from Reading University, UK.

I believe maintaining an in house development team offers significant benefits in the dynamic capabilities of our products.  We own all the expertise, and are always interested in picking up product customisation projects to better suit your requirements.

Mark Pereira

Technical Account Manager

I have a technical background in telecoms fault diagnostics and IT support services with a detailed understanding of networks and products. Working at BluGem for over 15 years I lead our test strategy with the aim of identifying limitations that cause revenue leakage and poor customer satisfaction.

Customer success is my main focus from delivering added value services across our solutions portfolio. Working in partnership with customers we act on their feedback to improve our solutions and test the latest network technologies and products.

Damien Puddifoot

Operations Manager

I started my career in the consumer electronics industry over 20 years ago studying analogue/digital radio reception technology and electronics, this supported my role working as an engineer repairing satellite receivers and other electronic devices. I stepped away from electronics to pursue a career in web development where I worked for a large award winning digital agency, which saw me take lead on projects for clients such as BP, Castrol & Wrigley to name a few.

While working as a Lead Web Developer I kept a close eye on the telecoms industry and always had an interest through my electronics knowledge about the principles and technology stacks used throughout telecom networks.

As the Operations Manager at BluGem I oversee our test service operations, I enjoy the exposure it gives me to both our diverse customer base and our bespoke test solutions.

Why BluGem?

“BluGem was formed in 2005 to provide an independent test solution to Communication Service Providers for regulatory compliance and revenue assurance using our patented real-time Test Call Generator.

The business has grown organically by building a strong reputation within the telecoms sector for quality, innovation and flexibility, with an extensive solution portfolio. We strive to support our customers in the ever changing telecoms landscape by providing innovative test event solutions, going above and beyond to deliver a positive ROI from strong test control features that assures your revenues and mitigates risk.”

John Davies – Co-Founder/Managing Director


We have over 18 years of extensive experience in telecom testing around the world, which is evidenced by our diverse international customer base of Tier 1/2 MNO, MVNO and Regulatory Authorities. Working in partnership with our clients we develop tailored services and solutions whilst forging long term supportive relationships.


Since December 2014 BluGem has achieved ongoing TÜV SÜD BABT Attestation approval, which certifies our products are compliant with the Communications Act for the UK Ofcom Metering & Billing Direction. Expert independent assessment gives you peace of mind over our products performance to support your metering and billing regulatory or audit test requirements.


Our In-house software development team constantly reviews our systems performance against the latest telecoms network features. This enable us to react quickly to changes in the market and keeps you competitive by testing the latest products, technologies and networks for revenue leakage and service assurance.


We understand technology and regulations change frequently so we offer flexible options and agreements so you’re not tied into a long contract with out-of-date services. We offer flexible options for CAPEX and OPEX with purchased systems, lease options and managed service solutions.

Reasons to choose us

Global Coverage

Over 100 countries

We test an expansive range of end-user devices and operating systems to validate products and services on home and international (roaming) networks.

Certified Solutions

TUV SUD attestation

Annual independent attestation of our test solutions by a leading approval body for quality and accuracy gives you peace of mind you are selecting a quality solution.

Investment Returns

Optimising ROI

Flexible and cost-effective options with quantifiable results and proven test cases that provide a quick return on your investment in addition to protecting your brand value.

Some of our valued customer partnerships