Our Leadership

Chryl Hoz

President and Director, 2017 - present

Chryl has been associated with The Sterling Group since 1986.  From 1991 until rejoining Sterling full-time in 2005, she has provided support for Gary Rosenthal in his various roles with Hydrochem Industrial Services, AXIA, Wheatley TXT Corp and Heaney Rosenthal Inc.  Chryl attended Rice University and studied Managerial Studies and Sociology.

Her love for volunteering, fundraising and cycling began in 1991 with The Leukemia & Lymphoma Society (LLS). She has completed 16 century cycling events with the Team in Training (TNT) program.  While she initially had no direct connection to a blood related cancer, she now has many.  She has served as Co-Chair for ARTcetera Houston (2008, 2013, 2017), Co-Founder of The Andy Allen Clays for a Cure Challenge (2014-present) and TNT League Chair (2017) and is the current President of Andy's Challenge.

John Olson

Vice President and Director, 2017 - present

John is current the Director of Professional Services Enterprise and Production for Canon Solutions America.  He has over 25 years of experience in business technology sales, service and support as both an entrepreneur and executive level manager. John attended Le Tourneau University.

John began volunteering with The Leukemia & Lymphoma Society (LLS) in 2008 when he and his son signed up to train and complete and half ironman event in memory of his mother. He became a cycling coach for Team in Training (TNT) and serves as a key leader within the organization. John is a Co-Founder of The Andy Allen Clays for a Cure Challenge.

Jeff Gunn

Treasurer and Director, 2017 - present

Jeff graduated from the University of Texas at Austin in 1995 with a Bachelor of Science degree in Mechanical Engineering.  He has worked in the deepwater oil and gas industry throughout his career, including seven years with ExxonMobil and four years with Shell.  He has managed project scopes in excess of $100 million, and managed teams of multi-discipline engineers across Europe, West Africa, and the United States.  In 2014 he left ExxonMobil to form Subsea Resources& Technologies, Incorporated where he serves as Managing Director and provides deepwater oil and gas expertise to clients like ExxonMobil and Hess.  


Jeff has volunteered for the Leukemia and Lymphoma Society since 2007, including recruiting and coaching bicycling teams for fundraising and as co-organizer of special fundraising events.

Luetta Allen, PhD

Secretary and Directors, 2017 - present

Luetta works with the MD Anderson Cancer Center as a Manager, Alliance Portfolio. She identifies opportunity, negotiates contracts and manages the alliance portfolio (strategic alliances between the University’s faculty and pharmaceutical companies). Luetta holds a B.S. from Texas A&M University in Genetics and a Ph.D.  in Development Biology, Molecular Genetics from the University of Texas Graduate Studies in Biomedical Sciences.

Her volunteer experience began with The Leukemia & Lymphoma Society (LLS) in 2007 as she became a primary spokeswoman and fundraiser for LLS.  Her son, Andy, was diagnosed with leukemia in 2002 and had recently finished 3 1/2 years of chemotherapy. She has been involved with The Andy Allen Clays for a Cure Challenge (2014-present) and continues to support LLS. Additionally, she was a Vice Chair and Chair, Board of Outreach for Faith Lutheran Church and is a Volunteer, Baby Bird Care and Feeding Team, Texas Wildlike Rehabilitation Coalition.

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Andy’s Challenge is a 501(c)(3) nonprofit organization with a mission to help fund cancer programs that support The University of Texas MD Anderson Cancer Center and Texas Children's Cancer and Hematology Centers. Support may include the sponsorship of other 501(c)(3)  organizations, specifically those associated with cancer research, patient assistance services, and other cancer causes.