Major General Gammanpila Arachchige Chandrasiri (known as G.A Chandrasiri), RWP, USP, ndc, psc, SLAC (born 1954) was a Sri Lankan senior army officer and a provincial governor.

[1] Chandrasiri joined the army in 1974, after basic training he was commissioned in to the 1st Reconnaissance Regiment, Sri Lanka Armoured Corps in 1976 as a Second Lieutenant.

After serving as a Troop Leader in the Ceylon Armoured Corps, he served as Officer Instructor, staff officer, adjutant, and squadron commander of the Sri Lanka Armoured Corps.

Following the end of the war, he was appointed by the President as Competitive Authority for approximately 3,000,000 internally displaced personnel and was in charge of the resettlement process.

He has received armoured warfare training in India, Fort Knox and attended the Senior Command Course in Mhow.