Jeffrey Cassis has been named senior vice president and chief operating officer at Color Kinetics, the lighting system and technology company. Cassis was previously president and chief executive officer of Millennial Net.

Joseph DiGiantommaso was named chief financial officer at InterSense, the precision motion technology company. DiGiantommaso was previously vice president of finance at I4 Commerce.

Christopher Grandi is now president of Eze Castle Integration, the provider of technology and IT services. Grandi had been managing director of business development at the company.

Brian Killen is now director of sales and marketing at Resolve Technology, the real estate software developers. Killen had been the founder and chief executive officer of FirstReef.

Eli V. Gelfand has joined the division of cardiology at Beth Israel Deaconess Medical Center, the patient care, teaching and research affiliate of Harvard Medical School. Gelfand recently completed his fellowship training in cardiovascular disease at Beth Israel.

Michael D. Jones has been named director of media relations for New England for Citizens Bank of Massachusetts. Jones was previously a vice president at the bank.

Paul Venditti was named an associate at Beacon Consulting Group, the financial services consulting firm. Venditti was previously a senior corporate securities operations analyst with Eaton Vance Management.

Marianne E. Brown is now a partner in the professional practices and business litigation groups at law firm Donovan Hatem LLP. Brown had been of counsel at Dilworth Paxson LLP.

Wayne A. Levy has been named the president and chief executive officer of MetroLacrosse, the not-for-profit sports education program. Levy was previously director of community relations for the Boston Celtics.

Vincent Montesano was named sales manager at 890 ESPN, an ESPN Radio affiliate. Montesano was previously a business development manager at CBS 4/WSBK 38.