Tay enlisted in the Singapore Armed Forces (SAF) in December 1981 and served in the Navy. Throughout his military career, he held various appointments, including: Executive Officer, RSS Sea Wolf (1987); Commanding Officer, RSS Swift Warlord (1988); Staff Officer, Naval Operations Department (1989–1990); Commanding Officer, RSS Sea Lion (1992); head, Naval Intelligence Department (1994); Commanding Officer, 188 Squadron (1997); Commander, 1st Flotilla (1998); Fleet Commander (1999); head, Naval Operations Department (2000–2001). He was promoted to the rank of one-star rear-admiral on 1 July 2001 and assumed the post of chief of staff, Naval Staff, on 20 July. Tay succeeded Lui Tuck Yew as the Chief of Navy on 1 April 2003 and was promoted to two-star rear-admiral on 1 July. He left the SAF on 31 August 2007 and relinquished his appointment to Chew Men Leong.[1][4]
Post-military career
After leaving the military, Tay served as the chief executive officer of the Infocomm Development Authority of Singapore from November 2007 to June 2013. He became the chief executive officer of the National Environment Agency on 1 July 2013 and continues to hold this appointment.[3][5][6] until his retirement in October 2018.
^ abcdef"Ronnie Tay's CV"(PDF). Infocomm Development Authority of Singapore. Archived from the original(PDF) on 2 February 2014. Retrieved 5 December 2013.
^"2013 Showcase". Anglo-Chinese Junior College. Archived from the original on 24 February 2014. Retrieved 5 December 2013. "My time in ACJC was certainly a most memorable one, capping my happy years in the ACS family of schools. The forging of my character and values and the high quality learning I received there have been a firm foundation for my service in the Republic of Singapore Navy." RAdm Ronnie Tay Chief of Navy 2003 -2007 Singapore Armed Forces Overseas Scholar 1982 Class of 2SA1 – 1981
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