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Arun Kalaiselvan has extensive experience as a database administrator. Arun began their career at HCL Technologies in 2007 as an Oracle DBA and worked there until 2010. Following that, they worked at Citi as a Sr. Oracle DBA from 2010 to 2012. Arun then joined AT&T as a Sr. Oracle DBA from 2012 to 2013 and later moved to T-Mobile as a Sr. Oracle DBA from 2013 to 2014. Arun then served as a Sr. Database Administrator at AT&T from 2014 to 2016. Currently, they hold the position of Principal Database Administrator at T-Mobile since 2017.

Arun Kalaiselvan attended Shanmugha Arts, Science, Technology and Research Academy where they pursued a B.Tech degree in Computer Science. In addition to their degree, Arun has obtained several certifications including the AWS Certified Database - Specialty from Amazon Web Services (AWS), and multiple Oracle certifications such as Oracle Certificate Associate in Oracle PL/SQL Developer, Oracle Certificate Expert in Oracle Database 11g RAC and GRID Infrastructure Administrator, Oracle Certificate Professional in Oracle Database 10g Administrator, and Oracle Certificate Professional in Oracle Database 11g Administrator. The exact months and years of obtaining the Oracle certifications are not provided.