Jo Ann Di Dario was named chief operating officer at Gartmore...

Jo Ann Di Dario was named chief operating officer at Gartmore Riverview LLC, Red Bank, N.J., a hedge fund manager. She replaces Simon Lefevre, who was acting COO and is leaving the firm, said John Gallagher, managing director. Ms. Di Dario was a consultant to Derivatives Portfolio Management LLC, Somerset N.J., on hedge fund back-office and administrative issues.