The announcement highlights continued ties between the Obama administration and the labor movement despite growing frustration among union officials about the healthcare law.
As of Tuesday, unions were on the cusp of issuing formal criticism of ObamaCare at the AFL-CIO's convention in Los Angeles, a major step intended to send a message to the White House.
At issue are unions' multiemployer health plans, which do not currently qualify for ObamaCare's tax credits. Labor argues that they should, or else employers are likely to drop the plans and shift workers into the new insurance exchanges.
SEIU President Mary Kay Henry emphasized Tuesday that the Affordable Care Act is "working for working people."
She appeared with Health and Human Services Secretary Kathleen Sebelius in Pittsburgh to announce the organization's outreach plans.