Our Team

Mark Rasch is the Founder and CEO of BenchMark Homes and a lifelong resident of the Des Peres/Kirkwood area. A respected leader in the St. Louis homebuilding industry, Mark has been an active member of the HBA of Greater St. Louis since 1990, where he serves on the Board of Directors and the Custom Home Builders Council. He is also a licensed Missouri real estate professional with Red Key Realty and a member of the Missouri Association of Realtors. Beyond his professional work, Mark is committed to giving back through volunteer leadership with “St. Louis Rebuilding Together.” Married to his wife Laura for over 35 years, they have two children, Marissa, a nurse, and Sydney, who works with BenchMark Homes.

Coming Soon

Coming Soon

Sydney Rasch is the Director of Operations at BenchMark Custom Homes, where she oversees business operations and drives growth initiatives. A graduate of the University of Missouri with a B.S. in Business Administration and a certificate in Human Resources, Sydney is also a licensed real estate professional. Actively involved in the homebuilding industry, she serves on the Professional Women in Building Council with the HBA and helps lead the Young Professionals group. With a strong work ethic, a passion for continuous improvement, and a belief that a positive attitude can achieve anything, Sydney is committed to advancing both her family’s business and the industry at large.

Karen Sloan is a seasoned Office Manager and Executive Assistant with over 30+ years in the field. She brings extensive administrative experience to BenchMark Custom Homes, with expertise in scheduling, correspondence, purchasing, and training. With a professional background spanning the pharmaceutical, electrical engineering, and communications industries, she adapts her skills to meet diverse client needs while maintaining a perfectionist’s attention to detail. A certified Notary, Karen also provides executive support and organizational leadership that increases efficiency across operations. Outside of work, she is passionate about animal welfare, volunteering her time to support neglected and rescued animals and raising awareness through ongoing outreach efforts.

Jeff Brinkman brings more than 31 years of hands-on experience in the building industry to his role at BenchMark Custom Homes. His passion for construction began when he built his first home alongside his father, later working at a local Illinois lumber yard where he gained a deep understanding of the industry from the ground up. With extensive expertise as an estimator and in cabinet design, interior finishes, and exterior millwork, Jeff combines technical skill with a sharp eye for detail. At BenchMark, he works closely with owners, architects, and subcontractors to bring clients’ visions to life—delivering projects on time, within budget, and to the highest standards of quality and craftsmanship.

Dina brings more than 17 years of experience in the homebuilding industry to BenchMark Custom Homes. She began her career as a community sales manager for a national builder, guiding customers through every step of the homebuying process. Her background also includes working for a global plumbing manufacturer, where she focused on driving business to distributors, training, and showroom design. Most recently, she served as a design consultant for a local semi-custom builder, managing the design process for luxury homes and high-end clients. Known for her attention to detail and customer-focused approach, Dina works closely with architects, estimators, and clients to create truly personalized homes. Outside of work, Dina is passionate about raising awareness for individuals with special needs, inspired by her daughter Chloe, and enjoys traveling, interior design, and spending time with her two children.