| Honorific Prefix: | Sir |
| Birth Date: | 24 May 1932 |
| Office: | Permanent Secretary at the Department of the Environment |
| Minister: |
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| Term Start: | 1985 |
| Term End: | 1992 |
| Predecessor: | Sir George Moseley |
| Successor: | Sir Richard Wilson (later, Lord Wilson) |
Sir Terence ("Terry") Michael Heiser (born 24 May 1932) is a former British senior civil servant.[1]
Heiser served as Permanent Secretary at the Department of the Environment from 1985 to 1992.[2]
Heiser was appointed Companion of the Order of the Bath (CB) in the 1984 New Year Honours. He was promoted to Knight Commander (KCB) in the 1987 Birthday Honours, and to Knight Grand Cross (GCB) in the 1992 New Year Honours.