The Internal Revenue Service will hire 600 to 700 new employees focused on tax enforcement, the agency's first significant enforcement hiring in more than five years.  Michael Gregory (Michael Gregory Consulting LLP), former territory manager with the IRS and now a business appraiser, consultant, and author, posted a memo from IRS Commissioner John Koskinen to agency employees. “Each enforcement position typically returns almost $10 to the U.S. Treasury for every dollar spent—and in many instances, much more,” says Koskinen in the memo.