Christopher Tauber was named principal and senior investment consultant at Mercer Investment Consulting, confirmed Mercer spokesman Charles Salmans. Mr. Tauber, who reports to Troy Saharic, principal in charge of the firms Seattle office, will be responsible for managing and developing institutional client relationships with defined benefit and defined contribution plans, endowment and foundation funds, and the institutional investments of health-care systems and insurance clients. It is a new position. Mr. Tauber was previously an associate investment consultant at R.V. Kuhns. No one has been named to replace him, according to a source at the firm.