The phrase "eminent expert" is correct and usable in written English.
You can use it to describe someone who has a high level of skill/knowledge in a particular area. For example, "He is an eminent expert in the field of psychology."
I have no reason to doubt the eminent expert evidence that was presented in this case to that effect.
"Think of each of these mountains like an island surrounded by forest," said Charles Brewer-Carías, a Caracas-based naturalist and explorer who is an eminent expert on Auyan-tepui and the country's other mesas.
As an eminent expert on Dutch genre paintings -- works that represent everyday life, rather than still lifes, portraits or historical events -- Dr. Sutton had the idea for the exhibition in 1984, while curating a broad survey of similar works.
"You need a strong man to run the country," whispered Claude Guéant [the French interior minister] into the ear of an eminent expert from the commission charged with overseeing constitutional reform in post-Ben Ali Tunisia.
An eminent expert whose own father's death by suicide changed his life, Joiner is relentless in his pursuit of the truth about suicide and deeply sympathetic to such tragic waste of life and the pain it causes those left behind.
But these very features allow detractors to reject the authority even of eminent experts.
Today she is one of the most eminent experts working in the family violence sector.
Three reports, by eminent experts, suggest the shots were fired without the silencer attached.
Umpteen eminent experts and committees have called for abolition of the mandatory sentence.
As eminent experts like Martin Wolf have recently warned, continued global growth is far from assured.
It was done without payment; the organizations' members, usually eminent experts in their own fields, received nothing beyond their expenses.
