Callan Associates Inc., San Francisco, plans to hire a "specialty consultant" to work on record-keeping searches for defined contribution plans.Clients have told Callan executives they want to "bridge the traditi onal gap that has existed between their treasury and human resources departments," said Bo Abesamis, vice president."We see this individual as a point person who understands investments and also knows the provider systems on the defined contribution side," he said. "Callan will be seen as a bridge to consensus between those two departments."Some of Callan's competitors already are in the business.Cathy Grimm, manager of participant services for Frank Ru ssell Inc., Tacoma, Wash., said Russell began a push into record-keeping searches in 1991."Since that time, our business in this area has significantly expanded. Today, we get calls regularly from sponsors saying that, given the c hanges in the marketplace with all the mergers and acquisitions, they're not sure where to turn to find these services," Ms. Grimm said.