Roger Grimes is a well-known cybersecurity expert and author. He has been working in the field of computer security for over 30 years, and is considered one of the leading experts on the subject of computer defense and security.

Grimes began his career in the early 1990s, working as a systems administrator and network security consultant. He quickly gained a reputation as an expert in the field, and began to work as a consultant for various organizations, including government agencies and large corporations. Throughout his career, he has also worked as a trainer, teaching others about computer security and defense.

In addition to his work as a consultant and trainer, Grimes is also a prolific author. He has written several books on computer security and defense, including "Malicious Mobile Code: Virus Protection for Windows" and "Windows NT/2000 Network Security." He has also written numerous articles and white papers on the subject, which have been published in various publications, including Computerworld, InfoWorld, and SecurityFocus.

In addition to his work as a cybersecurity expert, Grimes is also an active speaker and has been a keynote speaker at many conferences and events. He also frequently appears as an expert commentator in the media, discussing cybersecurity issues and providing insights on the latest trends and threats in the field.

Throughout his career, Grimes has been recognized for his contributions to the field of cybersecurity. He has received several awards, including the SANS Institute's "What Works in Security" award and the "Top 20 Most Influential People in Security" award from SC Magazine.

Grimes' work is widely recognized as being practical and actionable. He is known for his ability to explain complex security concepts in a way that is easy to understand, and for providing concrete advice and solutions to security problems. His work focuses on the real-world challenges that organizations face in protecting their networks and systems from cyber threats.

In summary, Roger Grimes is a highly respected cybersecurity expert and author with over 30 years of experience in the field. He is known for his practical and actionable advice on computer defense and security and his work is widely recognized as being influential in the field. He is also a frequent keynote speaker and media commentator on cybersecurity issues.