Orion : Sidoti Virtual Small Cap Conference Presentation

Sidoti Virtual Conference

January 13, 2021

Safe Harbor Statement

The matters discussed in this presentation may constitute or include projections or other forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, the provisions of which the Company is availing itself. Certain forward-looking statements can be identified by the use of forward-looking terminology, such as 'believes', 'expects', 'may', 'will', 'could', 'should', 'seeks', 'approximately', 'intends', 'plans', 'estimates', or 'anticipates', or the negative thereof or other comparable terminology, or by discussions of strategy, plans, objectives, intentions, estimates, forecasts, outlook, assumptions, or goals. In particular, statements regarding future operations or results, including those set forth in this presentation, and any other statement, express or implied, concerning future operating results or the future generation of or ability to generate revenues, income, net income, profit, EBITDA, EBITDA margin, or cash flow, including to service debt, and including any estimates, forecasts or assumptions regarding future revenues or revenue growth, are forward-looking statements. Forward looking statements also include estimated project start date, anticipated revenues, and contract options which may or may not be awarded in the future. Forward looking statements involve risks, including those associated with the Company's fixed price contracts that impacts profits, unforeseen productivity delays that may alter the final profitability of the contract, cancellation of the contract by the customer for unforeseen reasons, delays or decreases in funding by the customer, levels and predictability of government funding or other governmental budgetary constraints and any potential contract options which may or may not be awarded in the future, and are the sole discretion of award by the customer. Past performance is not necessarily an indicator of future results. In light of these and other uncertainties, the inclusion of forward-looking statements in this presentation should not be regarded as a representation by the Company that the Company's plans, estimates, forecasts, goals, intentions, or objectives will be achieved or realized. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. The Company assumes no obligation to update information contained in this document whether as a result of new developments or otherwise.

Please refer to the Company's Annual Report on Form 10-K, filed on February 28, 2020, which is available on its website at www.oriongroupholdingsinc.com or at the SEC's website at www.sec.gov, for additional and more detailed discussion of risk factors that could cause actual results to differ materially from our current expectations, estimates or forecasts.

2

Core Values Consistent with Strategy

We take pride in our personal workmanship and that of the entire organization; we are committed to ensuring that each task is properly performed the first time and we will continuously improve upon everything we do every day

We are responsible and accountable for our own personal safety; we are equally responsible for the safety of all our coworkers and any others we come into contact with; and we are authorized to and obligated to stop work whenever an unsafe condition, or situation is observed

We are committed to performing assigned tasks in the most efficient, timely and cost effective manner; we expect employees to safeguard company assets; and we always act in the best interest of the company

Quality Production

Safety	Integrity	The foundation of our success rests
		upon integrity; we view integrity as our
		ability to be honest, ethical, sincere
		and forthright in our dealings with
		others; we will apply the foundation of
		integrity in everything we do; and
		when the Company makes a
		commitment, that commitment must
		be kept

3

Company Overview

Orion Group Holdings, Inc., a leading specialty construction company, provides services in the Infrastructure, Industrial, and Building sectors through its marine construction segment and its concrete construction segment in the continental United States, Alaska, Canada and the Caribbean Basin.

NYSE: ORN			Marine		Concrete
Headquarters: Houston, Texas
# of Employees: ~2,300				56%
	46%
Market Cap: $82 million*	54%			44%
Average project duration: 6-9
Months	Q3'20 LTM		Q3'20
Book value per share $5.12	Revenue		Backlog

ServicesCustomers

Competition

Financials (LTM)

• Broad range of
  marine construction including marine transportation facility construction and dredging services
• Concrete construction services including light commercial, structural and industrial services

• Federal, State, Municipal Governments (41% of
  Revenue in LTM Q3'20)
• Private commercial and industrial clients (59% of
  Revenue in LTM Q3'20)

•	Highly fragmented market	•	$739.6 MM Revenue
•	Barriers to entry	• $53.4 MM Adj. EBITDA
•	Local, regional, and	•	$428.8 MM Backlog (9/30/20)
	national competitors

*asof 9/30/2020

4