Exhibit 99.1 MISTRAS Announces First Quarter 2024 Results Q1 2024 Revenue of $184.4 million, up 9.8% from the prior year period; highest Q1 Revenue since 2018 Q1 2024 Net Income of $1.0 million, reflecting an improvement from a net loss of $5.0 million in the prior year period Q1 2024 Adjusted EBITDA (non-GAAP) of $16.2 million compared to $10.4 million in the prior year period, up 55.1%; highest Q1 result historically PRINCETON JUNCTION, N.J., May 1, 2024 (GLOBE NEWSWIRE) -- MISTRAS Group, Inc. (MG: NYSE), ...