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Kaj Sigurd Ademar Arnö (born 29 June 1963 in Helsinki, Finland) is the current CEO of the MariaDB Foundation,[1] and former VP of the MySQL Community at MySQL AB, Sun Microsystems and Oracle Corporation. He joined MySQL AB as VP of Training in May 2001 and subsequently served in roles as VP Consulting, VP Services, VP Engineering and VP Community Relations till February 2008, when Sun bought MySQL AB. He served as VP of the MySQL Community in the Database Group at Sun Microsystems until June 2010, when the German subsidiary of Sun was integrated into Oracle.[2] In October 2010, he announced his retirement from Oracle.[3] He later became EVP Products at SkySQL, a company that sold support and consultancy for MySQL and MariaDB, and which later became MariaDB Corporation.

Kaj Sigurd Ademar Arnö
Kaj Arnö at FOSDEM 2019 in Brussels 03.jpg
Kaj Arnö at FOSDEM 2019 in Brussels
Kaj Sigurd Ademar Arnö

1963 (age 55–56)
Helsinki, Finland
ResidenceMunich, Germany
NationalityFinland, Germany
EmployerMariaDB Foundation
Known forMySQL, MariaDB

Arnö studied physics at the Helsinki University of Technology. Prior to joining MySQL AB, he was the main owner of Polycon Ab where he served as CEO from 1987 to 2001.

Arnö was the main spokesperson towards the MySQL community from 2005 onwards, as well as a frequent speaker at MySQL events.[4]

Other workEdit

Arnö has condensed his philosophy of running into what he calls "Runnism, the Religion of Running".[5]


  1. ^ Arnö, Kaj (2019-01-30). "A Word from the Incoming CEO". Retrieved 2019-02-01.
  2. ^ tweet_btn(), Gavin Clarke 7 Oct 2010 at 19:20. "MySQL veteran drifts clear of Oracle Borg".
  3. ^
  4. ^ "Planet MySQL".
  5. ^ "Runnism".

External linkEdit

  Media related to Kaj Arnö at Wikimedia Commons