Investor Presentaiton

STN TSX NYSE EXCELLENCE INNOVATION PEOPLE GROWTH 1000 800 600 400 200 Energy & Resources Industrial engineering services for private sector energy, resource, and power clients 15% % of Net Revenue Q2 2020 YTD Net Revenue (C$ Millions) Dokie Wind Energy Project British Columbia Net revenue by sector Q2 2020 YTD CAGR 12.7% 0 2017 2018 2019 LTM Q2 2020 10 WaterPower & Dams ■Mining ■ Power ■ Oil & Gas Net revenue by geography Q2 2020 YTD ■ Global ■Canada United States

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