![](https://www.marinelog.com/wp-content/uploads/2021/03/GregHarmerCallan-300x225.jpg)
Callan Marine names Greg Harner COO
Galveston, Texas, headquartered dredging contractor Callan Marine has hired of Greg Harner as its new Chief Operating Officer. A 36-year veteran of the construction and maritime industry, Harner comes to Callan with