Thomas Limoncelli

Thomas Limoncelli

Time Management and System Administration author/trainer

Bloomfield, New Jersey

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Thomas A. Limoncelli is the author of O'Reilly's Time Management for System Administration. Tom is an internationally recognized author, speaker, system administrator, and DevOps advocate. His other book projects include The Practice of System and Network Administration and The Practice of Cloud System Administration (Pearson). He works in New York City at He's previously worked at Google, Bell Labs/Lucent, AT&T, and other companies. His blog is and he tweets @YesThatTom. His "Everything Sysadmin" column in ACM Queue Magazine appears 3 times a year. He holds a B.A. in Computer Science from Drew University. He lives in New Jersey.

Areas of Expertise:

  • time management
  • IT policy
  • speaking
  • training
  • writing



“This book is worth your dollars and your time. Even if you are skeptical of his system, the book is worth a read for ideas and insight. It should be given to every new sysadmin when hired, and anyone who manages sysadmins. I plan on recommending it to my boss and colleagues.”
— Martin Gehrke, SNAPGH