Voluntary Retirement Plans
For employees looking to save money for retirement in addition to the mandatory contribution, Mines offers several options. Participation in these plans is voluntary and employees can enroll, change contribution amounts, or end participation at any time.
Please note that for all voluntary retirement plans, there is not a Mines matching contribution.

Mines 403(b) Plan
The Mines 403(b) plan offers investment in a variety of independent mutual funds as well as a self-directed brokerage option. The plan offers both a traditional pre-tax account and a Roth Option. Services including free financial advising are provided through Corebridge Financial Services. For more information please contact Corebridge Financial Advisors (information below). To enroll in the 403(b) or change contribution amounts please log in to Workday.
Julianne Buttler
Corebridge Retirement Services
- 720.636.5239
- 720.962.8000 (District Offices)
- julianne.butler@corebridgefinancial.com
Courtney Watson
Corebridge Retirement Services
- 719.396.4647
- courtney.watson@corebridgefinancial.com
Financial Advising appointments are available for ALL MINES staff whether you are enrolled in the MDCP or PERA DB or DC plans.
PERA Plus Program
This program is open to employees regardless of eligibility to participate in the PERA Defined Benefit Plan. The PERAPlus program offers both 401(k) plan and 457 plan options. Both traditional pre-tax and Roth options are available. For more information please see the PERAPlus website at:
Link to PERAPlus: (Click here)
Enrollment in the PERAPlus 401(k) and 457 voluntary retirement savings plans is available at any time. Both plans offer the same PERAdvantage investment options and Empower Retirement is the recordkeeper for both plans.
All beneficiary assignments for retirement are directly made in Corebridge or PERA.