Our Health Insurance and Benefits Advising Story

We started ESIS to serve Sacramento and Northern California mid-size and large employers with 25-500 employees that wanted a truly customized benefit package to fit their unique group health insurance plan needs, backed by ongoing service and consultation by dedicated benefits experts.

Knowing our market inside and out and having strong relationships with a wide range of national and regional group health insurance plans gives you a well-rounded tailored benefit package for your team.

You will notice a difference in our services compared to others. When you call us, you don’t get a generic call center, your calls and your employees’ calls are taken personally by our advisors and professional account management staff. If you’re looking for health insurance for small businesses in Sacramento to Napa, ESIS is the name you can trust.

Headquartered in Northern California, we think globally but act locally, with personal services designed specifically for each individual client. ESIS Inc. combines an experienced team with cutting-edge products to provide exceptional value to our clients.

Team Bios

ESIS Leadership Team


Shannon Zajec, CEBS

Benefits Advisor and CEO


Mark Zajec

Benefits Advisor and COO



Benefits Specialist



Benefits Specialist




Benefits Specialist




Benefits Specialist




At ESIS we believe in the importance of an individual’s wellness, including caring for the mind, body and service to others through involvement in our community. We contributed time and resources to the following deserving organizations:

  • Keaton Raphael Memorial
  • Placer SPCA
  • River Oaks Center for Children
  • Placer Foodbank
  • Girl Scouts of America
  • United Advocates for Children and Families
  • Rotary International

Our roster of clients continues to grow. Businesses looking for group health insurance in Roseville, CA to the Bay Area can turn to the team of dedicated experts from ESIS. Apart from Sacramento and Roseville, CA area, we offer our services to those in the following counties:

  • Rocklin
  • Fairfield, CA
  • Vacaville, CA
  • Napa, CA
  • Davis, CA
  • Folsom, CA
  • Elk Grove, CA
  • Grass Valley, CA
  • San Francisco Bay Area, CA

We also serve Nevada cities. Any city east to Reno, west to San Francisco, north to Chico and south to Fresno.

Find a truly customized benefit package for your employees and contact us today!