Exhibit 99.1 TTEC Announces First Quarter 2024 Financial Results First Quarter 2024 Revenue was 576.6Million,down8.9PercentOperatingIncomewas22.7 Million or 3.9 Percent of Revenue (37.9Millionor6.6PercentofRevenueNon−GAAP)NetIncomewas0.5 Million or 0.1 Percent of Revenue (12.6Millionor2.2PercentofRevenueNon−GAAP)AdjustedEBITDAwas54.9 Million or 9.5 Percent of Revenue Fully Diluted EPS was 0.01(0.27 Non-GAAP) Reiterates Outlook for Full Year 2024 DENVER, May 8, 2024 – T ...