12 October Day in the life A Day in the Life of an Oil and Commodities Expert Witness Independence, 11. Report Writing, 15. Giving Oral Evidence, Oil Trading, Commodity Trading, Singapore, Dubai International Finance Centre Catherine Jago is an oil and commodities Expert Witness with nearly four decades of experience in the field. She started her career at BP before working as an oil journalist, broker and trader. In 2023 she founded her own international Expert Witness practice, CJH Experts, which carries between 20 and 30 live instructions at any one time. Here, she tells us how she came to the role in unexpected circumstances, what makes a truly good Expert, and why independence is never negotiable.