 HOUSTON--BUSINESS WIRE--Orion Group Holdings, Inc. NYSE: ORN the Company, a leading specialty construction company, today announced that its Executive Vice President CFO Robert Tabb and VP of Investor Relations Francis Okoniewski, are scheduled to participate at the D.A. Davidson Diversified Industrials and Services Virtual Conference on Wednesday, September 22, 2021. Orion Group Holdings will present at 4:15 pm ET that day, and will participate in virtual meetings with investors 