Michael J. Bacevich joined Hartford Investment Management, Hartford, Conn., as senior vice president to run a new bank loan portfolio management unit. In addition, Clifford M. Abramsky, Michael A. Ashton, John P. Connor and Francesco Ossino were hired to work in the unit. All are new positions. All of them came from CIGNA Investment Management, Hartford. Mr. Bacevich was previously head of the leveraged loan team; the others were on his team.