Dr MacEwen has 26 years experience in the IT field as a faculty member in the Department of Computing and Information Science at Queen's University in Canada. During this time he has published numerous journal and conference papers, published a textbook on computer systems, and acted as a reviewer for several research journals. He has supervised numerous PhD dissertations and served on many engineering and natural science examination committees. Dr MacEwen also co-founded a software company, Andyne Computing Limited, and became a director when it became a successful public company. Since leaving Queen’s University 10 years ago, Dr MacEwen has been a technical editor and writer. The fields he focuses on include computer security, computer systems, software engineering, computer science, formal methods, requirements specification, electrical engineering, engineering, mathematics, information technology, telecommunications, computer networks, and operating systems. Dr MacEwen joined the Edanz Group as an editor and writer in 2010.