For information on Open Enrollment, CLICK HERE

Questions or concerns about Benefits?  Need help resolving issues?

Contact Marlene Elenbaas, Rocky Flats Benefits Administration: (303) 456-4747 or email her at 

Marlene’s work schedule is Monday, Tuesday and Thursday mornings.

Rocky Flats Benefits Center – 
P.O. Box 9920

Providence, RI 02940-4020
Phone: (866) 296-5036
Fax: (888) 501-9768


The following topics are examples of the information that needs to be communicated to the Benefits Center:

  • Medicare enrollment
  • Death in family
  • Divorce
  • Marriage
  • Move to a new location
  • New child 

Medical and Life Insurance Administration

  • General Benefits Questions
  • Death Reporting
  • Address Changes

Pension Administration:  Prudential Insurance Company

Retirees/surviving spouses, in the event of death, Prudential must be notified at 1-800-621-1089 (in addition to the Benefits Center).

Plan Sponsor, Hanford Mission Integration Solutions, LLC (HMIS)


HMIS Benefits Resolution: Contact Carolina Farmer , 509-376-7954.

The following letter announced the transfer of the Benefits Plan from Washington Rivers to Hanford Mission Integration Solutions

Mercer sold their Benefit Administration business to Morneau Shepell. The administration of Rocky Flats Retiree healthcare was part of that sale which also included most employees of Mercer being offered positions with Morneau Shepell. Letters were sent to all plan participants.