About Us

Mentor’s people are trusted ‘hands-on’ specialists in delivering complex transformation and business-critical initiatives.

Each specialist has over 25 years of frontline management experience in IT, telecoms, media, and service companies. Most have held senior management positions in marketing, network, IT, product development and large-scale program management.



David Hilliard

Chief Executive

David is the Chief Executive of Mentor. He is a trusted hard-core specialist with encyclopaedic skills on strategy execution – a down-to-earth practitioner, with over 30 years’ experience in telecoms, media, and service industries.

He has helped many clients setup new businesses – Energis, Eircell, Virgin Mobile, Three, 5 Television and Tele2. Other key clients include Airwave, BT, Cable & Wireless, Dell, eir, EE, Lilly, O2,, Vodafone and BSkyB.

David provides managers with practical tactics to unclog problems blocking high performance. He believes committed specialists continuously challenge themselves to keep getting better at their craft. And it shows in the work they do.

He is the author of “It’s ‘Deja Vu’ all over again” with his partner Ian Waters. An edgy, street-savvy exposé on how companies repeat the same execution howlers again and again.

Ian Waters


Ian is a Partner at Mentor.

He is an experienced advisor with a long track record of developing and implementing pragmatic strategies that deliver concrete results.

He has advised Operators, Vendors and Financial investors in over 40 countries on a range of Operational, Strategic and Financial issues.

Recent clients have included EE, Cable & Wireless, telent, Ericsson, eir, Lilly and O2. He has also advised numerous Private Equity Investors on investments in telecoms, IT, and service industries.

Prior to joining Mentor, Ian was a founding partner in Credo, an international Strategy Consultancy, where Ian was responsible for its Telecoms activities.

Mike Hosie


Mike operates successfully at Board level as a COO and Change Director for listed and unlisted telecoms, technology and media companies.

He is a proven leader in large, complex organisations where time-to-market is critical – involving people, process, policy and technology. He produces exceptional results – managing and coaching teams while delivering financial and operational objectives through effective strategic alignment.

His recent experience includes building [and launching] the world’s first LTE-only network from the ground up, in parallel with setting up the Network Operator for Tele2 in the Netherlands.

Prior to this, he delivered the Change Program at MBNL to ensure the business met its strategic objectives for the LTE networks of the two shareholders, EE and Three. Mike also managed the Program that delivered the back office and financial systems to support of the first ever mobile consumer business for O2.

What you get from Mentor

Mentor’s direct, gritty, truth-telling approach helps companies deliver their toughest execution challenges. We appreciate clients don’t care about methodologies – only about results.


We are trusted by global industry leaders, including Vodafone, BT, Sky, EE, O2,, Sony, Dell.

For more than 25 years, Mentor’s work has been in program acceleration and delivery. We help companies sidestep the most glaring pitfalls that can lead to program collapse.

Our direct, gritty, truth-telling approach helps companies deliver their toughest execution challenges. We’ve seen it all – everything from helping innovative startups launch, to working with large global companies delivering strategic business initiatives worth hundreds of millions of pounds.

Why we get hired

Mentor has seen it all. From helping greenfield startups launch – to working with large global companies – to delivering business-critical programs worth hundreds of millions of pounds.

See what industry leaders have to say about Mentor.