Hoo attended Catholic High School and Hwa Chong Junior College.

He also attended the RAAF Command and Staff College in 1995 and received the Sir Richard Williams Prize for Oratorical Excellence.

In 2000, under the SAF Postgraduate Scholarship, he obtained a Master of Public Administration from Harvard University and graduated as a distinguished Littauer Fellow.

[2][1] During Hoo's tenure, the RSAF was involved in humanitarian assistance and disaster relief activities, such as the search for the missing Malaysia Airlines Flight 370 in March 2014, the recovery of Indonesia AirAsia Flight 8501 in December 2014, and aerial firefighting in Sumatra in October 2015.

[4] Hoo stepped down from his appointment as the Chief of Air Force on 28 March 2016 and was replaced by Mervyn Tan Wei Ming.