National Investment Managers, a pension consulting and administration...

National Investment Managers, a pension consulting and administration firm that also provides investment management to small businesses and high-net-worth individuals, acquired Stephen H. Rosen and Associates, a retirement planning, pension plan design and administration company. The acquisition provides regional synergies with National Investment Managers' other operation in the Philadelphia area, said spokeswoman Alyson Nikulicz. Stephen H. Rosen, president of the eponymous firm and also president of the American Society of Pension Professionals & Actuaries, will remain with the firm.