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The City heavyweight was managing director of JP Morgan's UK asset management arm, and ran its Natural Resources Fund until 2012
He is currently a director at BMO Capital Markets.
Bluejay CEO Rod McIllree said bringing on Henderson as a director was a coup.
"For over 30 years Ian was widely regarded as one of the best commodities managers in the City, with the JP Morgan Natural Resources fund reportedly returning 764% over the last 10 years that Ian was at the helm," he said.
"Attracting someone of Ian's calibre, with a track record of identifying and supporting some of the most exciting and significant companies in the natural resources space over recent decades, is a tremendous endorsement of both the quality and commercial value of our assets, and our team's ability to translate this potential into tangible returns for shareholders."