In 1952 he was commissioned in to the Ceylon Electrical and Mechanical Engineers as a Second Lieutenant and under took the Young Officers' Course at the Royal Electrical and Mechanical Engineer Officer School.
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During the 1971 Insurrection, as a Colonel he was appointed Chief of Civil Defence based in Colombo and thereafter took up appointment as the Military Coordinating Officer for Mannar, commanding military operations in the district.
Dennis Hopper | Dennis Quaid | Dennis the Menace | Dennis Rodman | Dennis Miller | Dennis Potter | Dennis Haysbert | Dennis the Menace (1959 TV series) | Dennis Kucinich | Dennis Morgan | Dennis Lillee | Dennis Dart | Dennis Prager | Dennis Oppenheim | Dennis Waterman | Dennis Green | Dennis Franchione | Dennis | Sandy Dennis | Hugh Dennis | Dennis Morgan (songwriter) | Dennis Lehane | Dennis Adams | Dennis Wilson | Dennis Wheatley | Dennis Tito | Dennis O'Keefe | Dennis Cooper | Dennis Christopher | Dennis Brown |
Brigadier Dennis Hapugalle, VSV, psc, SLAC - former Chief of Civil Defence and Permanent Secretary, Ministry of Internal Security.