It is run by the Dublin and Dun Laoghaire Education and Training Board (DDLETB) and is a non-fee paying school.

In 1973, Greenhills College offered adult education and leisure-type classes to the local community.

The college also provides post-Leaving Certificate (PLC) and Vocational Training Opportunities Scheme (VTOS) courses for adult learners.

[1] The Olympic Gold medallist and boxer, Michael Carruth, is a former student of Greenhills College which he attended with his two brothers.

[2] The curriculum offered covers a number of common subjects in the state examinations including German, Art, Music, Business, Engineering, Materials Technology Wood, Construction, Metalwork, Religious Education, Science and History.