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"We are what we repeatedly do. Excellence, then, is not an act, but a habit" - Aristotle.

Analytical - Creative - Practical - Professional

Dr Stephen Castell CITP
CASTELL Consulting
Castell Computer and Systems Telecommunications Limited (founded 1978)
Management and Financial Consultants in Information Technology

PO Box 334, Witham, Essex CM8 3LP, United Kingdom
Tel: +44 1621 891 776 Mob: +44 7831 349 162
PO Box 270529, San Diego, CA 92198, United States of America
Tel: +1 (310) 890-9859


Founded 1978. Independent, professional consultancy services in software and systems, telecommunications, broadcasting, marketing and the media.

Expert Witnesses experienced in all aspects of computer disputes and litigation, well-known and respected by legal professionals internationally. Entrepreneurial new business development specialists.

Clients say: "CASTELL is in many respects unique in the totally professional and stunningly effective way it makes things happen and gets things done for its clients and business partners. If you want results, economically, on time, and with high quality implementation, go to CASTELL."

Professional expert services offered and business proficiency, management and implementation also in:


  • Assisting in Patent, Software Copyright, Trade Secrets, Intellectual Property cases
  • Technology Investment Appraisal
  • Mergers & Acquisitions Assessments, Strategy, Advice and Management
  • Information Security: Cyber Risks, Protections and Insurances Review
  • Venture Capital Assistance, Finance Sourcing, Capital-Raising Business Planning and Prospectuses
  • Business Development Consultancy


Retained Expert for, an online service which provides expert advice on compliance in Data Protection, Fraud Prevention and Corporate Governance.

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