Sterling Infrastructure Investor Presentation — September 2020

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DA Davidson Diversified Industrial & Services Virtual Conference

Disclosure: Forward -Looking Statements

2This presentation contains, and theofficers and directors oftheCompany may from time totime make, statements that areconsidered forward -

looking statements within themeaning oftheSecurities Actof1933 and theSecurities Exchange Actof1934. These forward -looking statements are

subject toanumber ofrisks and uncertainties, many ofwhich arebeyond ourcontrol, which may include statements about :thescope and duration

oftheCOVID -19pandemic and itscontinuing impact onnational and global economic conditions ;and ourbusiness strategy ;financial strategy ;and

plans, objectives, expectations, forecasts, outlook and intentions .Allofthese types ofstatements, other than statements ofhistorical fact included

inthis presentation, areforward -looking statements .Insome cases, forward -looking statements can beidentified byterminology such as“may,”

“will,” “could,” “should,” “expect,” “plan,” “project,” “intend,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “pursue,” “target,”

“continue,” thenegative ofsuch terms orother comparable terminology .The forward -looking statements contained inthis presentation arelargely

based onourexpectations, which reflect estimates and assumptions made byourmanagement .These estimates and assumptions reflect ourbest

judgment based oncurrently known market conditions and other factors .Although webelieve such estimates and assumptions tobereasonable,

they areinherently uncertain and involve anumber ofrisks and uncertainties that arebeyond ourcontrol .Inaddition, management’s assumptions

about future events may prove tobeinaccurate .Management cautions allreaders that the forward -looking statements contained inthis

presentation arenot guarantees offuture performance, and wecannot assure any reader that such statements will berealized orthe forward -

looking events and circumstances will occur .Actual results may differ materially from those anticipated orimplied inthe forward -looking

statements due tofactors listed inthe“Risk Factors” section inourfilings with theU.S.Securities and Exchange Commission (“SEC”) and elsewhere

inthose filings .The forward -looking statements speak only asofthedate made, and other than asrequired bylaw, wedonot intend topublicly

update orrevise anyforward -looking statements asaresult ofnew information, future events orotherwise .These cautionary statements qualify all

forward -looking statements attributable tousorpersons acting onourbehalf .

This presentation contains thefinancial measures “EBITDA,” “Adjusted EBITDA,” and “Adjusted EPS,” which arenot calculated inaccordance with