My Team

As a Financial Representative for the Northwestern Mutual Financial Network, Luke is committed to helping his clients whether they are concerned for their own financial needs or those of their family or business. Luke doesn't do it alone. Here you will find a listing of the people who help make it happen.

Together, we stand committed to providing the best customer service possible. If you have a problem or need assistance at any time, please let us know.

Brian Kelly Burg

Brian Kelly Burg, CLU®, RICP®

Office 605-323-6618

Brian has been with Northwestern Mutual for over 15 years and serves as my financial planning associate.  In this role Brian helps me deliver financial security to my clients by developing personalized financial plans based on my client's specific goals.  Brian also consults with me to provide investment product solutions as part of our long-term strategy which is consistent with the goals outlined in the plan.  Brian has a degree in Satellite Communications from Mitchell Technical Institute and holds the Chartered Life Underwriter, Retirement Income Certified Professional designations. He holds the Series 6,7,9,10,63 and 66 and is fully licensed in life, health and disability insurance.  He currently resides in Sioux Falls with his wife Christine and four daughters.

Casandra K. Vergil

Casandra K. Vergil

Director of Operations and Client Service
Office 605-348-2085

Originally from Western Nebraska, Cassie has lived in Rapid City since 2013. Cassie has always had a passion for helping others, which has led her to a career with Northwestern Mutual where she enjoys the opportunities to foster trusted relationships with clients and their families. You will most likely look to Cassie to partner with you and assist in application needs and understanding.

Cassie can usually be found outside of work with her husband Robby and their 3 year old daughter Alexx at the local Gym, training at home, kayaking, fishing or reading a good book!  Cassie and her family love the Black Hills and the people here and know that Rapid City will always be where they call home!

We look forward to getting to know you and your family!


Lucas Pulscher, CLTC®, RICP®, WMCP®

Wealth Management Advisor


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