Investor Presentaiton

MasTec Oil & Gas Segment Among the largest U.S. pipeline contractors, with footprint in all major productive basins Balanced portfolio of pipeline services, offering union & non-union services * Self-perform, state-of-the-art operations Excellent safety record High degree of visibility in large project and midstream pipeline markets, especially in the Permian Basin Demand driven by desire to reduce commodity transportation costs Midstream & gathering pipeline demand driven by increased drilling and production activity $70 Revenue from Oil & Gas ($ in millions) ~41% CAGR for 2008-2019 $2,024 $1,738 $1,495 $3,497 $3,289 $3,117 2008 2014 2015 2016 2017 2018 2019 22 22

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