Who We Are

  • George Gumbiner


    George, a native of Denver, received a BA and an MA in public administration from the University of Colorado in Boulder. He has also studied at the Hebrew University of Jerusalem, 1973-1974. Since graduation, Gumbiner has been in the employ of Bank Leumi le Israel, Omnibancorp and MDC Holdings, along with three major investment companies, E.F. Hutton, Prudential Securities and A.G. Edwards & Sons, Inc., the latter for over nine years. He is also involved in numerous non-profit and charitable organizations both here in Colorado and globally.

  • Stephanie K Ruark


    Stephanie has been with us for two wonderful years. She brings with her 20 years of knowledge and experience in the retirement planning, investment and insurance arena; from 401(k)’s, 403(b)’s, SIMPLE IRA’s, college saving plans, to trust accounts and managed investment accounts, as well as life insurance and annuity planning. Stephanie is a native to Colorado and loves to spend time outdoors camping, skiing and hiking with her husband and their blended family of a daughter and four sons. 

  • Bolet Duman

    Associate Wealth Manager

    Bolet moved to Colorado from New Jersey where he received his BA in Financial Planning from William Paterson University. He previously worked for PNC Bank who sponsored him for his Series 7 (Securities License) and he is currently working towards the CFP designation.Bolet’s primary responsibilities include developing and implementing personal financial plans, reviewing investments, presenting educational and retirement workshops, creating hypothetical reports for clients, and continuing to assist our clients achieve their financial goals.Bolet enjoys snowboarding, practicing kickboxing and Jui Jitsu as well as spending time with his cousins in CO hiking and camping.


  • Genesis Fox

    Operations Manager

    Genesis comes to us with five years’ experience providing consistent approachable customer service for customers and vendors at Dish Network and other companies. She is very personable and has high standards of excellence in her work ethic. Genesis also displays outstanding communication skills, continuously projecting a highly professional image while adapting quickly to new and evolving changes within the industry.


    Genesis Fox was born in Jacksonville, Florida but has lived most of her life in Colorado. She loves going to the movies, playing PlayStation 4 and most importantly spending time with her dog Tux.

  • Alexandria Pavkov

    Alexandria is our newest memeber at Marathon Investment Management. She grew up in a small town in Ohio and has recently just moved to Colorado. She has a 7 year customer service background and an associates degree in Marketing and Sales. She handles client relations and plans to go to school this fall for financial planning to further her carreer at Marathon. 

    Her hobbies include sampling different breweries, hiking, and painting. She dreams of one day influencing the stock market industry in an impactuful way. 

    She has traveled from Cancun to The Virgin Islands, until she reached China where she lived for nearly two months. The business trip in China inpacted the way she views international markets and trade in the United States.