The latest merry-go-round of executive changes at footwear firms has been centered around the critical chief financial officer position. Since the start of the new year, Caleres, Genesco, On and Designer Brands have all announced moves that will impact their operations in the year ahead. Some of the incumbent step-downs were due to the pursuit of a new job; in other cases, fresh initiatives dictated change. More from WWD At Shoe Carnival Inc., W. Kerry Jackson last September was named executive vice pre ...