* City National Investments has appointed James...

* City National Investments has appointed James Ludwick as a regional business development officer. His responsibilities include investment, trust, custody and pension services for high net-worth individuals in Ventura County, the western San Fernando Valley and southern Santa Barbara County.

City National Investments is the trust and investment division of City National Bank.

* Mario A. Uribe has joined ACT Networks as vice president of sales. He joins ACT from Newbridge Networks, where he was vice president of sales and general manager responsible for the eastern United States and Israel.

ACT Networks is a telecommunications company based in Camarillo.