Manage My Retirement Benefits. The Retirement Office is responsible for managing investments and retirement benefits for Allegheny County Employees' Retirement System (ACERS) Plan members.For calculating income, use only. Set aside money towards their retirement. From traditional and Roth IRAs to SEP IRAs, SIMPLE IRAs and solo 401(k)s, selfemployed individuals can find a plan that suits their needs. Service in the Retirement Plan for Employees of Allegheny General Hospital before. First, complete your enrollment task from your Workday homepage. Then review additional benefits and services through our Employee Advantage program. Allegheny Health Network 401(k) Plan. Introduction. Pension Plan for Management Employees of Allegheny.