Sherrie's Team


I take customer service very seriously. So does my staff. Together, we are committed to providing exceptional customer service to all of our clients.

If you need to schedule an appointment, make changes to your policy, submit a claim or request any other service, please let us know. We will respond promptly.

Kristen L Bigham

Kristen L Bigham

Director of Operations
Office 312-548-1796

Kristen started her career with Northwestern Mutual in 2013. A native of Texas, she was drawn to Chicago to attend graduate school at Roosevelt University.  Upon receiving her Masters of Music degree, she joined Sherrie’s team and made Chicago home.  As Director of Operations, her mission is to deliver an exceptional client service experience.  Kristen is licensed in life, health, and accident insurance.  In her spare time, she enjoys exploring the great city of Chicago and is actively involved in the vibrant Chicago art scenes as a performer, director and arts administrator.

Kristen can assist with:

  • Client Service
  • Insurance Application Processing
  • Insurance Client Service
  • Investment Client Service
  • Answers to Questions About Underwriting Requirements or Status
Siara M Lump

Siara M Lump

Associate Financial Representative
Office 312-548-1826

A native Chicagoan, Siara brings more than six years of experience in customer service and client relations to her role as an Associate Financial Representative. She joined Sherrie’s team in 2017. A graduate of Rasmussen College with a degree in Human Resource Management and Leadership, she continued her education earning the series 6 and 63 securities licenses and is licensed in life, health and accident insurance. Outside the office, Siara enjoys exploring downtown Chicago, practicing yoga and riding her bike.

Siara can assist with:

  • Scheduling  Appointments
  • Scheduling Medical Exams
  • Preparing Client Annual Reviews
  • Marketing
  • Client Service Support
Vitaliy K Sturlis

Vitaliy K Sturlis

Senior Investment Specialist
Office 312-641-8900

Vitaliy graduated from Loyola University Chicago in 2009 with a BA in Finance and Economics. He started off at Northwestern Mutual - Chicago as an intern in 2008 and has been here ever since. Vitaliy oversees the operations of the investment Planning Department and manages a team of seven analysts and interns. His more specific duties include portfolio construction, management, and upkeep.


Sherrie Robért VanKoevering, CLTC®

Financial Advisor


To learn more about Northwestern Mutual Investment Services, LLC and its financial representatives, visit: FINRA BrokerCheck