Waltham (Mass.) Contributory Retirement System is searching for two managers, one to run $7.5 million in global fixed income and another to handle $5 million in private real estate. The $155 million pension fund is adding the portfolios for diversification, and funding will come from a general rebalancing, said Joseph Juppe, board administrator. Both RFPs are available on the Massachusetts Public Pension Forum website at http://mppf.org/searches.htm. Proposals for both are due 3 p.m. EDT April 23, and selections are expected in May. Segal Advisors is assisting.