保育人士的英文.....??

涉及古蹟/文物保育範疇
(Issues relating to the monuments and heritage preservation)
1.Monuments and heritage preservater
2.People who work for / have feelings toward heritage preservation [1]
3.Monuments and heritage protector

涉及環境保育範疇
(Issues relating to the nature conservation)
1. People who work for nature conservation [2]
2. Nature conservator

Reference:
1. Line6-7, Para 2 of the passage "Transcript of SDEV's remarks"
http://www.devb.gov.hk/en/secretary/press/press20070801.htm
2. http://www.epd.gov.hk/epd/english/environmentinhk/conservation/conservation_maincontent.html