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Achim Ludwig Dietzenbach: Achim Ludwig Dietzenbach is a cybersecurity professional and network infrastructure specialist with over 15 years of global experience across IT systems, network security, and cyber defense. A former Security Operations Centre Analyst at IBM Singapore, he has worked extensively with advanced security monitoring and incident response platforms including CrowdStrike, QRadar, Proofpoint, and Splunk. His background also includes systems engineering roles in Siemens and UBS, giving him deep technical expertise in threat detection, endpoint protection, and IT infrastructure management. Achim holds a Bachelor of Science (First Class Honours) in Network Computing from Oxford Brookes University and professional certifications including CISSP, CEH, and CompTIA Security+.
In the CompTIA Certified SecurityX Training course, Achim leverages his practical cybersecurity operations experience to help learners build a strong foundation in security architecture, incident management, and vulnerability mitigation. His sessions focus on threat analysis, network defense, and hands-on application of CompTIA security principles, ensuring participants develop the skills required to protect and maintain secure IT environments.
Agus Salim: Agus Salim is an IT security and cloud infrastructure professional with more than a decade of experience in cybersecurity operations, system integration, and enterprise project management. He has worked with multinational firms such as Check Point Software Technologies and Citi, where he specialized in firewall configuration, incident handling, and vulnerability management. A certified PMP, CompTIA Security+, CEH, and Azure Security Engineer, Agus brings both managerial insight and deep technical knowledge across cloud platforms, security tools, and enterprise software environments.
In this course, Agus combines his technical expertise and leadership experience to train participants in implementing robust security frameworks aligned with CompTIA standards. His approach emphasizes real-world scenarios, from penetration testing and incident response to cloud security and compliance. Learners benefit from his ability to connect cybersecurity theory with modern operational practices used across global organizations.
Truman Ng: Truman Ng is a seasoned cybersecurity and network engineering expert with more than 20 years of experience in IT infrastructure, machine learning, and automation. He holds multiple industry certifications, including PMP®, Huawei HCIE®, Cisco CCNP®, and Trend Micro Certified Security Expert (TCSE). His training portfolio spans cybersecurity, AI applications in security analytics, and network defense technologies. Truman has designed and delivered advanced courses in cybersecurity, machine learning, and DevSecOps, combining technical rigor with an applied focus on industry-relevant skillsets.
In the CompTIA Certified SecurityX Training course, Truman helps learners master the principles of secure network design, risk assessment, and incident prevention. His sessions emphasize cybersecurity resilience, data protection, and automation in threat detection using industry-standard tools. With his blend of technical expertise and instructional experience, he prepares participants to succeed in professional cybersecurity roles and CompTIA certification examinations.
Peter Cheong - Peter Cheong is an IT and knowledge management professional with strong expertise in networking, cybersecurity, and information systems. He has completed the Cisco Networking Academy Introduction to Packet Tracer course
and has participated in international ICT and knowledge management conferences such as the IFLA Knowledge Management Satellite Meeting. With professional experience in IT systems and infrastructure, Peter brings both technical knowledge and global exposure to his training.
As an adult educator, Peter focuses on building learners’ foundational skills in cybersecurity, network defense, and risk management aligned to CompTIA Security+ objectives. His sessions emphasize real-world security scenarios, equipping participants to recognize vulnerabilities, manage threats, and implement effective security controls. His combination of practical training and industry exposure ensures learners are well-prepared for both the certification exam and workplace application.\\
Alec Tan Chee Wee - Alec Tan is an IT trainer and systems engineer with over 20 years of experience spanning IT technical support, system integration, and IT training. He holds multiple CompTIA certifications, including A+, Network+, and Server+, and is also WSQ ACLP-certified, equipping him with both the technical expertise and the pedagogical skills to deliver effective training. His professional career includes roles as a Network Systems Engineer at McKinn International and freelance IT trainer at Nexus Academy, where he taught Office 365, Big Data, Artificial Intelligence, and CompTIA certification programs.
With strong technical competencies in Microsoft Windows Server, desktop and laptop support, and IT infrastructure management, Alec brings a wealth of hands-on experience to Security+ training. His teaching emphasizes practical learning, covering key Security+ domains such as threat management, identity access, cryptography, and risk mitigation. By combining deep technical knowledge with a learner-focused approach, Alec ensures participants are well-prepared to achieve Security+ certification and apply cybersecurity principles in real-world IT environments.
