Shawn Sterling has been a system administrator for over 20 years everywhere from small startups to very large enterprise. He is passionate about system administration / devops / technology / automation / cloudy stuff and has spoken about it at various conferences and user groups / meetups. You can find some of his talks on youtube: https://www.youtube.com/watch?v=bSAgQqa49nM or hit him up on Twitter @systemtemplar.