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Management Team

Michael Rosen

President |

Mr. Rosen has over 40 years of auction/appraisal experience in the machinery and equipment industry, all with Rosen Systems. He began in this business working for his father, Irv Rosen, and has served in various management roles throughout the business including field supervisor, senior appraiser, and auctioneer. Mike earned his BBA from the University of Texas at Austin, graduating in 1976. He also is a certified equipment appraiser (CEA) and real estate broker. Mike has served on the boards of the Industrial Auctioneers Association, and Machinery Dealers National Association, and is a past president of the Association of Machinery and Equipment Appraisers, and is a member of the National Auctioneers Association (NAA) and Texas Auctioneers Association (TAA).

David Dalfonso

Vice President of Valuations |

Mr. Dalfonso has over 25 years of experience in the valuation and appraisal industry, specializing in machinery and equipment, all with Rosen Systems. David has served in various roles throughout his tenure including director of research, auctioneer, and senior appraiser. David earned his Bachelor of Science in business management from The College of Steubenville. He is also a certified equipment appraiser (CEA), and a member of the MDNA, AMEA, and National Association of Credit Management.

Kyle Rosen

Vice President of Auction Services |

Mr. Rosen has been in the industrial auction and appraisal industry since 2003, specializing in machinery and equipment, all with Rosen Systems. He has served in various roles including director of research, field supervisor, appraiser, and auctioneer. Kyle earned his Bachelor of Economics with an emphasis in business from the University of Texas at Austin. He is also a member of the Industrial Auctioneers Association (IAA) serving on the board of directors as president, treasurer, and vice president, National Auctioneers Association (NAA), and Texas Auctioneer's Association (TAA).  Kyle is also an Accredited Equipment Appraiser (AEA) through the AMEA.

Colleen Heaton

Director of Operations, South Texas |

Ms. Heaton began her auction career in 2009 leading teams with the Federal Deposit Insurance Corporation (FDIC) auctions, inventories, and appraisals. She specializes in managing U.S. Bankruptcy cases, business liquidations, and institution surplus auctions. She holds a Bachelor of Arts Degree from Columbia College. In 2014 she obtained Graduate Personal Property Appraiser (GPPA) designation through the National Auctioneers Association (NAA).  Colleen became a Texas licensed auctioneer in 2020.

Kyrah Lewis

Director of Advertising & Marketing |

Kyrah is a graduate of Jacksonville State University, where she earned her AACSB Accredited Bachelor of Science in Marketing. She has over a year of experience as a Digital Marketing Specialist & Social Media Manager.

Hilary Case

Director of Business Development |

Hilary contributes a diverse range of professional experiences, infusing dynamic leadership to propel growth and ensure lasting success at Rosen Systems. Holding a Bachelor’s degree in Music Therapy from Southern Methodist University, she established a solid foundation for her career. Committed to excellence and innovation, Hilary brings a distinctive combination of strategic thinking and sales acumen to our team, cultivated through her roles in the Technology and Real Estate industries. Her expertise in asset acquisition, strategic account management, and operational excellence is a valuable asset as we strive for continued innovation and excellence, consistently delivering exceptional results for our clients.

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Phone: (972) 248-2266
Fax: (972) 248-6887

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