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Any newly hired employee who is hired from December 2023 through November 2024 who elects to enroll in any Aetna Medical plan during their new hire benefits election will receive a one-time lump sum payment of $900.

This is a one-time incentive for newly hired employees who enroll in an Aetna plan!

Note: This incentive payment will also include any extra-help employee who is newly hired as a Regular/Permanent employee, since the Aetna medical plans were not previously available to extra help employees. This payment will be taxed according to your W2 tax exemption that you set up in Workday.

Find out more information about the Aetna medical plans.

Welcome to the County of San Mateo

The County of San Mateo offers a variety of benefit options to eligible employees, including health, work/life, financial, and voluntary benefits.

  • Benefits Eligibility: All regular, temporary, provisional and term employees working 20+ hours per week are eligible to enroll themselves and their eligible dependents
  • Effective Date of Coverage: First of the following month after hire date
  • For Extra Help or ACA-Eligible employees benefits information including eligibility, visit
Health Benefits IconHealth Benefits Work Life Balance IconWork/Life Benefits Financial Benefits IconFinancial Benefits Voluntary Benefits IconVoluntary Benefits

New Employee Benefits Orientation

The Benefits Staff is dedicated to making your benefits enrollment a simple process. Please review this year's Benefits Guide carefully to help you make important decisions regarding your benefits. 

We highly encourage you to also attend one of our upcoming New Employee Benefits (NEBO)/Extra Help New Employee Benefits (EHNEBO) Orientations, held every other week virtually through Microsoft Teams except on the 2nd NEBO/EHNEBO of each month which is held in-person.


2024 New Employee Benefits Orientation Schedule

January: 1/2 (virtual), 1/16 (in-person), 1/30 (virtual)

July: 7/2 (virtual), 7/16 (in-person), 7/30 (virtual)

February: 2/13 (virtual), 2/27 (in-person) August: 8/13 (virtual), 8/27 (in-person)
March: 3/12 (virtual), 3/26 (in-person) September: 9/10 (virtual), 9/24 (in-person)
April: 4/09 (virtual), 4/23 (in-person) October: 10/8 (virtual), 10/22 (in-person)
May: 5/7 (virtual), 5/21 (in-person) November: 11/5 (virtual), 11/19 (in-person)
June: 6/4 (virtual), 6/18 (in-person) December: 12/3 (virtual), 12/17 (in-person), 12/31 (virtual)
The Orientation is held on Microsoft Teams EXCEPT on the 2nd NEBO/EHNEBO of each month which is held in-person.



NEBO Schedule

Regular & Limited Term NEBO *In-Person NEBO starts at 8:15am

  • 8:00am – 9:50am – Regular NEBO Benefits Presentation
  • 9:50am – 10:10am – SamCERA
  • 10:10am - 10:30am – Empower (Formerly MassMutual)

Union Session for Regular, Limited Term, and Extra-Help

  • 10:30 – 11:00am – Union

Extra-Help NEBO

  • 11:00am – 11:20am – Empower (Formerly MassMutual)
  • 11:20am – 12:00pm – Extra Help Benefits Presentation

You will receive an e-mail with information about the NEBO training with instructions on how to sign up for a session in our Learning Management System (LMS).

Courts and DSA/OSS Safety employees, please contact your Department Payroll to confirm your attendance.

If you have any questions or run into a problem while enrolling, we are here to help. Call the County Benefits Office at (650) 363-1919 or e-mail us at


Employee Benefits Guides & Rates
Information you need to make informed decisions about your benefits for yourself and your family.... View more

Rules for Coverage Eligibility
Coverage type, age restrictions, eligibility definitions, and required documentation... View more

Changes to your benefits
You are responsible for updating Workday and creating the appropriate life event during the plan year (adoption, birth, death, divorce, dissolution of domestic partnership, marriage, etc.) within 31 d... View more

Contact Employee Benefits Staff
Email or call 650-363-1919... View more

Want to Review/Change Your Benefits?

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Watch a video about your benefits & Workday!

Watch Now!

Employee Benefits Self-Service

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Use Workday to view and update your benefits and opt in to receive your tax documents electronically!

Find Out How