John Valentine, MBA, is a seasoned professional with extensive experience in sales engineering and systems management across various sectors. Currently serving as a Senior Sales Engineer at Calix, John previously held significant roles including Senior Manager of Systems Engineering at Extreme Networks, where leadership was demonstrated over a team of 10 Systems Engineers supporting substantial sales in diverse markets. John's background includes technical pre- and post-sales support for federal clients at Enterasys and Cabletron Systems, as well as serving in the United States Air Force in communications operations and network services. John holds an MBA from Keller Graduate School of Management of DeVry University and a Bachelor of Science in Mathematics and Computer Science from McKendree University.
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