S: (n) agronomist (an expert in soil management and field-crop production)
S: (n) all-rounder, all arounder (a versatile person who is expert at many things) "she's the best all-rounder they've seen in years"
S: (n) analyst (someone who is skilled at analyzing data)
S: (n) analyst (an expert who studies financial data (on credit or securities or sales or financial patterns etc.) and recommends appropriate business actions)