Albert Witteveen has been working both as an operations manager and a professional tester for nearly two decades now. The combination of setting up complex server environments and professional testing almost automatically led to a specialisation in performance testing. He wrote a practical guide to load and stress testing which is available at Amazon. This books discusses how to do performance testing, how to provide real value and how to assess the performance in an objective way. It describes how to perform the tests, what and how to monitor, how to design the tests, how to setup the team and how to report. As a test manager he employs the lessons learned in operations to make testing, more efficient as well as more effective.