James River Group Holdings, Ltd. announced that Brett Shirreffs has joined the Company as Senior Vice President, Investments and Investor Relations, effective September 20, 2021. He will report directly to Sarah Doran, Chief Financial Officer of the Company. As Senior Vice President, Investments and Investor Relations, Mr. Shirreffs will be responsible for investments, investor relations, and rating agency activity. He joins James River from Argo Group International Holdings, Ltd. (Argo), where he most recently served as Group Treasurer and Head of Investor Relations. Prior to Argo, Mr. Shirreffs was a Vice President of Investment Banking at Keefe, Bruyette and Woods, where he also had earlier worked within equity research covering property and casualty insurers.