IRS is one of the largest and most-respected staffing agencies, with one of the largest
healthcare divisions in the nation! Founded in 1986 in Phoenix, Arizona, and still owned
and operated by its original founder, Mark Finkelstein, IRS is the only original owner,
continuously operating for-profit agency in the State of AZ. In fact, IRS's market share
can typically exceed 70% of all outsourced shifts in its home area in certain ancillaries.