John Iain Henderson

b. 1956

Last updated September 28, 2026

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Time on boards

Boards served
2
Board service
34 years
Director since
1998

34 years of board service in total across 2 boards, counting each seat separately. Longest: Diploma Holdings PLC, 18 years.

Diploma Holdings PLC Director
18 years · 1998 – 2016
Diploma PLC Director
15 years · 2000 – 2016

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