Meet some of the team responsible for providing technical support, project consultancy and account management to our London clients.

ISN head office staff

ISN's key head office staff

David Greenwood – Managing Director

David Greenwood

David started his IT career at Barclays Bank in New Zealand, where he became operations manager for the company's mainframe systems. On moving to the UK he expanded his technical and management skills at Enterprise Oil as well as Hardy Oil and British Borneo. David's wide experience, cool judgement and instincts for technical excellence are key to shaping ISN's service to our clients.

David Ellison – Director

David Ellison

Although David has a language degree, he discovered early on that IT concepts and programming languages came just as easily. His understanding of how to get the most from IT systems without losing sight of the commercial aspect has been key for consultancy roles at Enterprise Oil, Flemings, NatWest, and Fortis. David enjoys helping ISN clients develop innovative IT strategies that maximise their investment as well as honing ISN to provide world class IT services.

Derek Munro – Director

Derek Munro

Following an honours degree in Electronic and Information Engineering at RGU in Aberdeen, Derek began his career as a Communications Engineer for Enterprise Oil. A Chartered Electrical Engineer and proficient Project Manager, Derek has a track record in delivering large IT and telecommunication projects around the world.

He splits his time at ISN between managing our operations department and account management for key clients. ISN and our customers, benefit from Derek's focused approach in meeting their goals.

Alex Billowes – Engineering Manager

Alex Billowes

After a degree in Computer Science, Alex developed his IT experience in business consulting, county councils, newspapers and insurance before joining ISN in 2002. Although his technical expertise is second to none, what he enjoys most is working with customers to define and realise their goals.

His ability to steer his engineers through complex projects make him an invaluable member of ISN's management team. Clients say that they know their problems will be solved if Alex is on the case.

Call us on 020 7313 8300

The people at ISN always make dealing with IT problems less painful! They have a friendly, approachable way of working and communicate effectively regardless of the level of IT literacy of our employees.

Barbara Hardwick

Accounts & Office Manager, Hartwell Buck Ltd

Quick tip

Protect your network from viruses

Ensure every PC and server has virus protection software installed and that it is automatically updated every day. Make sure that the product you use will work with email-borne viruses, since most viruses spread via email. Don't open suspicious attachments and don't act on virus hoaxes received from well-meaning friends.