Investor Presentaiton

32 EXCELLENCE INNOVATION PEOPLE GROWTH STN TSX NYSE Canada millions (C$) $400 $1,200 $300 $200 $100 $1,000 $800 $600 Gross Revenue $400 $200 Net Revenue 50 $0 $0 Q4 19 Q4 18 2019 2018 Quarterly Highlights Continued organic growth in Environmental Services and Transportation Some retraction in Power and Water New mining projects and TransMountain spurred growth in Energy & Resources Winnipeg City of Stories Winnipeg Une ville s University of Manitoba Museum Phase II Winnipeg, MB, Canada Q4 19 FY 2019 Net revenue growth 1.6% 2.0% Organic net revenue growth 1.6% 0.1% Backlog at December 31, 2019 $1.0B

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