Elder Johnny has retired from the Singapore Armed Forces (SAF) in March 2015, after serving the nation for 30 years. In the SAF, he has done project management, training development, as well as commanded battalions and training institutes. Elder Johnny stepped down as the Chairman of the Church Board of Covenant EFC in April 2015 and assumed the appointment of Missions Director in Covenant EFC. In Covenant EFC since 1989, he has served as an officer and captain of the Boys Brigade ministry as well as a worship leader, Covenant Group Leader, Area Overseer and marriage mentor. He holds an MBA from the University of Western Australia. He is married to Clara and they have three children.
Elder Johnny Tan