Fred Hall had a varied career in the building services industry before lecturing on craft, technician and professional examination courses at Guildford College. His numerous books on the subject have assisted countless students to successfully pursue their qualification objectives.

Roger Greeno is a well-known author of construction texts. He has extensive practical and consultancy experience in the industry, in addition to lecturing at several colleges of further and higher education, and the University of Portsmouth. He has also examined for City & Guilds, Edexcel, the Chartered Institute of Building, the University of Reading and the University College of Estate Management.