Financial terms of the deal were not disclosed.
Founded in 1995, Marina del Ray, California-based Jamison/Gold develops Internet systems using Web technologies such as Java, Shockwave/Flash, streaming audio and video, and e-commerce applications.
The company also developed an interactive game on the Internet, called "Adventure With An Attitude," which was featured on Sony's Web site to coincide with the launch of the PlayStation video game system.
"Jamison/Gold brings to Keane proven and innovative capabilities in implementing Web-based solutions," John Keane, Jr., president of Keane, said in a statement
Jamison/Gold is Boston-based Keane's latest acquisition in a series of deals intended to expand its geographic and services reach.
Analysts say the $1 billion company must continue to build its outsourcing and business applications capabilities to compete as its core business of helping firms prepare their computer systems for the year 2000 starts to dry up.
Last August, Keane acquired Icom Systems of Birmingham, England. Keane also acquired two companies to help build its customer relationship management capabilities, including El Segundo, California-based Fourth Tier and San Mateo, California-based Emergent.