Exhibit 99.1 ASGN Incorporated Reports First Quarter 2024 Results Revenues and Adj. EBITDA near the top-end of guidance ranges Approves new 750millionstockrepurchaseprogramApril24,2024RICHMOND,VA.—(BUSINESSWIRE)−−ASGNIncorporated(NYSE:ASGN),aleadingproviderofITservicesandsolutionstothecommercialandgovernmentsectors,reportedfinancialresultsforthequarterendedMarch31,2024.Highlights•Revenueswere1.05 billion • Net income was $38.1 million • Adjusted EBITDA (a non-G ...