John Ilgenfritz

 John Ilgenfritz - Principal Instructor / Writer

As a Principal Instructor John has over 15 years partnering with VMware in delivering training and experience in course development. A VMware Certified Instructor since 2007 he has delivered over 500 engagements both in-person and online from a repertoire for over 200 courses. 

In the early 2000s, he worked as a senior software engineer. Languages included C, C++, Java and numerous scripting languages. Maintained a development environment using VMware virtualization solutions. Supported global team members and assisted with provisioning remote development build environments along with source control systems.

In addition, he has provided consulting services leveraging his virtualization experience. Designed performance optimization strategies and implemented migration solutions for remote multi-site data centers.

He is also co-author of a book on preparing for VMware certification.


Sample of John's Surveys:

Awards and Certifications


VMware Top 10 Certified Instructor 2023 - AMER



VMware Certified Instructor  - VCI Level 1-2 (2007+)

VMware Certified Professional - VCP-DCV 3,4,5,6,7 

VMware Certified Advanced Professional - VCAP 5-DCA

Linux Foundation:  

LFS201: Essentials of Linux System Administration

LFS207: System Administration Essentials

LFS211: Linux Networking and Administration

LFS 216: Linux Security Fundamentals

LFS253: Containers Fundamentals

Others: CompTIA A+, MCSE on Widows NT 4.0

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VMware / Broadcom Authorized Class List

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