Mark Birch is an experienced courseware developer and teacher in both information systems and cyber-security. Mark has been developing content and teaching CompTIA A+ classes for more than 20 years and understands the subject area in great depth. Mark began his career working within the aerospace industry (for a major defense contractor) and has over 30 years’ experience consulting, engineering, and deploying secure information systems. He has spent over 20 years working with the United States Military and United Kingdom Armed Forces, helping many students attain their learning goals. Mark has ensured that soldiers, officers, and civilians have had the best opportunities to gain cyber-security accreditation.