Described as "experts of harvesting and mineral extraction", Extraction Experts get +6% to base hull space and +22% extraction rate per level for all resources. This increased extraction rate is essential to the extraction of high value commodities, like Platinum. This skill is found at von Mises space station in the Free Market galaxy through a mission set.
To calculate your extraction rate (extractions per minute):
Base/(1 + 0.22*lvl)= extraction per minute.
Where base is the base rate per minute and lvl is your level in Extraction Expert.
See also: Trade Skill Level Table