 HOUSTON--BUSINESS WIRE--Orion Group Holdings, Inc. NYSE: ORN the Company, a leading specialty construction company, today announced that it will issue its financial results for the first quarter ended March 31, 2021 on Wednesday, April 28, 2021, after the close of the stock market. ORNs management will conduct a conference call on Thursday, April 29, 2021 at 10:00 a.m. ET to review these results. To listen to the call live, dial 201-493-6739 and ask for the Orion Group Holdings Confere 