Aviation industry veteran and entrepreneur, Iver L. Retrum has strong background in business and general aviation, with a focused expertise in real estate development, transactions, and valuation. His professional background includes leadership roles with aviation companies such as Signature Flight Support, ARINC Direct, and SunBorne XVI, Ltd., as well as more broad development and finance experience with McClurg Century Investments. He has command of a broad palate of professional capabilities, sharpened from over 25 years of frontline experiences in aviation operations, and real estate development.
Mr. Retrum’s aviation real estate experience started with his six-year employment at SunBorne XVI, Ltd (SunBorne), and the development of Centennial InterPort, a 125-acre aviation campus at Centennial Airport. Mr. Retrum was integrally involved in all aspects of the InterPort project, including the successful negotiation of ground leases totaling 7-acres, and over 309,000 SF of build-to-suite and existing office/hangar leases. During his time at SunBorne, Mr. Retrum also acquired his Colorado real estate license, as well as co-founded Hangar Network, LLC, an industry leading web-based real estate listing service.
Mr. Retrum co-founded the Business Aviation Group, LLC (BA Group) to provide aviation based real estate consulting services to high net-worth individuals, airports, FBOs, and businesses. Today, along with the dedication and experience of his partners, Mr. Retrum has grown the company into a full-service aviation real estate company, assisting clients in holistic design, feasibility, and development of aviation facilities, as well as real estate transaction, marketing, and general consulting services. Hangar Network, LLC has been acquired by BA Group, and is currently being absorbed into what is now known as Aviation Property Network or APN. This new subsidiary of BA Group is continuing to develop its well-known industry listing service by adding a national team of affiliated and regionalized aviation real estate professionals. Mr. Retrum plays a wide-ranging role within the company from Managing Broker, Director, and Partner.
Mr. Retrum is a 2013 recipient of Airport Business Magazine’s 40-under-40 award. He has contributed valuable service to the aviation industry as the founding chairman, and 8-year board member of the Colorado Aviation Business Association (CABA), as well as a past chairman of NBAA’s Local and Regional Groups Committee. Iver is commercially rated pilot and lives in Littleton, CO with his wife Dr. Jessica Retrum, and son Lars.
Joanne is a highly accomplished professional with 27 years of experience in the real estate and appraisal industry, as well as executive-level operations management. Through her extensive expertise and dedication, she has established herself as a renowned figure in the field.
Throughout her successful career, Joanne has excelled in various areas of real estate, specializing in both commercial and residential sectors. Her outstanding track record as a top-producing real estate broker has earned her numerous accolades and awards, recognizing her exceptional performance and commitment to delivering outstanding results for her clients.
Beyond her professional endeavors, Joanne finds immense joy in her personal life. She is a devoted wife and loving mother of four children, and she takes great pleasure in spending quality time with her family.
Furthermore, Joanne is an avid outdoor enthusiast who cherishes every opportunity to connect with nature. She particularly enjoys exploring the great outdoors with her beloved dog names Faith, whom she considers as an integral part of her family. Joanne if also devoted to her beekeeping business and educating the public of the plight of the honeybee. She has taught in Douglas county schools, Girl Scouts of America, and various other clubs/schools. Joanne has also been seen on the race track, and is a professionally trained Porsche driver.
In addition to her professional achievements and passion for family and nature, Joanne is currently pursuing her private pilot’s license. This endeavor exhibits her relentless curiosity and determination to further expand her skill set, explore new horizons, and better her position in her career.
Spencer Mamber is a highly accomplished realtor with over 18 years of full-time experience serving the greater Denver market. His passion for aviation has been a driving force throughout his career, which led him to work at Business Aviation group.
Prior to becoming a realtor, Spencer had a successful retail career in Denver that spanned over two decades. This extensive background in customer service has honed his ability to provide exceptional service and build strong relationships with his clients. For Spencer, customer service has been a way of life for a long time, and he prides himself on going above and beyond to meet and exceed his clients’ expectations.
Adding to his impressive resume, Spencer has been a pilot for over 50 years. He served as a United States Air Force pilot for eight years and spent an additional four years as a USAF instructor pilot. This wealth of aviation experience has allowed him to develop a deep understanding of the industry, while also showcasing his commitment and dedication to his craft.
Even today, Spencer’s passion for aviation remains strong as he continues to be a part-time flight instructor and owner of two airplanes. His list of impressive students includes an astronaut, highlighting his expertise and ability to mentor and guide aspiring aviators.
With his vase experience, unwavering passion for aviation, and exceptional customer service skills, Spencer Mamber is a trusted realtor who brings a unique perspective and dedication to every client interaction.