Mark Shoemaker is a Principal Instructor and Course Developer at Zenoss. He possess expertise in software development, software engineering, enterprise software, web applications, cloud computing and 18 more skills. Colleagues describe him as "Mark was the senior technical instructor when I was just beginning my time teaching at Tivoli. I attended his 3 week "Train the Trainer" course to gain competency in the Tivoli application suite in advance of going on the road to teach students. As someone with a degree in Education and years of practical classroom experience, I believe I have a certain amount of credibility in assessing instructors, and Mark was unparalleled in his abilities. I found him to be prepared, competent, engaging and encouraging. In my years prior to Tivoli I thought I had learned enough to be an excellent instructor, but Mark unfolded many new concepts and techniques for me, both as an instructor and a colleague. In addition to his superior technical and instruction skills, Mark is a genuine joy to work with, consistently funny and willing to help. I would welcome any opportunity to work again with him."