Kenneth van Ditmarsch is a highly experienced freelance virtualization consultant. Being one of the few VMware Certified Design Experts (VCDX), he has clearly added value in virtualization infrastructure projects. His knowledge and extensive project experience was gained especially during his last years at VMware and several specialized consulting firms.

Kenneth agreed on reviewing this book mainly because he is currently working on projects based on several VMware Site Recovery Managers. Kenneth has a personal blog on virtualization that can be accessed at http://www.virtualkenneth.com.

Andy Grant is a technical consultant for HP Enterprise Services. Andy's primary focus is Data Center infrastructure and virtualization projects across a number of industries, including government, healthcare, forestry, financial, gas and oil, and international contracting. He currently holds a number of technical certifications, including VCAP4/5-DCA/DCD, VCP4/5, MCITP: EA, MCSE, CCNA, Security+, A+, and ASE - HP BladeSystem.

Outside of work, Andy enjoys hiking, action pistol sports, and spending time adventuring with his son.

Daniel Langenhan is a client-focused virtualization expert with more than 18 years of international industry experience.

His skills span the breadth of virtualization ranging from architecture, design, and implementation for large multitier enterprise client systems to delivering captivating education and training sessions in security technologies and practices to diverse audiences.

Utilizing his extensive knowledge, experience, and skills, he has a proven track record of successful integration of virtualization into different business areas, while minimizing cost and maximizing reliability and effectiveness of the solution for his clients.

He gained experience from Australian, European, and international enterprise clients. Daniel's consulting company is well established, with strong industry ties in many verticals, such as finance, telecommunications, and print. His consulting business also provides services to VMware International Ltd.

He has authored the following books: