1966 - 1970:	IES was founded on 1 July 1966.
1971 - 1980:	IES successfully pressed for the introduction of the Professional Engineers Bill, which became law on 2 January 1971.
1981 - 1990:	IES purchased premise at Bukit Tinggi Road to construct the IES Building in August 1983.
	IES commenced Building Project for Bukit Tinggi premise on 15 November 1985.
	IES completed Building Project at Bukit Tinggi premise on 6 February 1987.
	The IES Building was officially declared open by Mr S Dhanabalan, then-Minister for Foreign Affairs and Minister for National Development, on 15 October 1987.
	IES established the Continuing Education Centre (CEC) for the professional development of its members and the public in 1990.
1991 - 2000:	IES, together with members of the building industry (ACES, REDAS, SCAL, SIA, SIBL, SISV, and SPM), formed the Construction Industry Joint Committee (CIJC) in 1997.
	IES initiated “Engineers’ Week” to recognize the contributions made by engineers in March 1998.
	IES presented the “IES Prestigious Engineering Achievement Awards” to five recipients in 1999.
2001 - 2010:	IES chaired the CIJC from 2001 – 2002.
	IES set up the Engineering Accreditation Board (EAB) in May 2002 as a body to accredit engineering programmes which are delivered and awarded in Singapore.
	IES gained entry into the Washington Accord as a provisional member in June 2003.
	IES joined the World Federation of Engineering Organisations (WFEO) and Federation of Engineering Institutions of South East Asia and the Pacific (FEISEAP) as member in 2004.
	IES spearheaded a year-long campaign titled “Engineering Year 2005/2006” campaign to promote engineering as the choice of career for tertiary students in June 2005.
	IES set up IES Academy (IESA) to take over the expanding role of CEC on 1 April 2006.
	IES gained full signatory status in the Washington Accord in June 2006.
	IES was recognized as a “Friend of Water” by PUB Singapore in September 2006.
	IES signed MOU with NTUC and launched the IES-NTUC Associate Membership Programme on 6 July 2007.
	IES held the inaugural “IES Distinguished Lecture” on 3 August 2007.
	IES signed an MOU with SIM University (UniSIM) and launched the UniSIM-IES Executive Graduate Diploma in Technology Entrepreneurship (TEN) and an Executive Master of Technology Entrepreneurship degree programmes on 3 August 2007.
	IES launched a special publication titled “Who’s Who in Engineering, Singapore” during its 41st Annual Dinner & Dance on 26 October 2007.
	IES signed an MOU with Defence Science & Technology Agency (DSTA) and launched the Certified Systems Engineering Professional (CSEP) certification programme on 19 March 2008.
	Er. Lee Bee Wah elected as First Woman President of IES during 42nd IES Annual General Meeting on 24 May 2008.
	IES signs MOU with HP Singapore, IBM Singapore, Oracle Corp. and Sun Microsystems to promote Systems Engineering on 30 June 2009.
	IES hosted the 27th Conference of ASEAN Federation of Engineering Organisations from 30 November to 2 December 2009, themed "Engineering for Sustainable Environment".