Mario DeSimone

Deal Risk Analyst at Knock

Mario DeSimone has extensive experience in the real estate industry. Mario started their career as a Co-Owner/Manager at AZ Core Properties, LLC, where they purchased properties at trustee sales and property auctions and managed their construction and remodeling. Mario then worked as a Realtor at Cosmopolitan Properties/Realty Executives International, where they served as a buyer's agent for local and Canadian clients and worked with trustee sales and property auctions.

Following this, Mario worked as a New Home Counselor at Beazer Homes, utilizing consultative selling to identify opportunities and maintain good relationships with customers. Mario then served as a Community Sales Manager at Grand Homes, where they maximized sales by demonstrating the value and quality of new homes and ran all aspects of the sales office.

Mario also worked as a Custom Home Sales/Project Manager at Palais Builders, where they worked with clients through the process of home conceptual design and layout. Mario then joined Redfin as a Lead Agent, responsible for customer delight and managing a large number of clients throughout the home buying process.

Prior to their real estate roles, Mario worked as a Location Manager at Dollar Thrifty Automotive Group, where they used their management and leadership skills to drive results across multiple areas of operations. Mario also worked at Coldwell Banker Residential Brokerage as a Licensed Realtor and at CENTURY 21® as a Realtor.

Most recently, Mario has been working at Knock, where they took on various roles, including Deal Risk Analyst, Loan Advisor, Agent Success Manager, and Licensed Local Expert. In these roles, they provided support and guidance to borrowers and their agents, managed realtor relationships, and generated accurate market analyses and offers on behalf of clients.

Overall, Mario DeSimone has a wealth of experience in the real estate industry, with a focus on sales, customer service, and management.

Mario DeSimone has a Bachelor of Science degree in Technical Management from the DeVry Institute of Technology. In 2003, they obtained an Arizona Real Estate License from the Arizona School of Real Estate and Business, where they studied the Fundamentals of Real Estate Practices. In 2014, Mario obtained a Texas Real Estate License from the Champions School of Real Estate.


Previous companies

Century 21 logo
Redfin logo
Beazer Homes logo


  • Deal Risk Analyst

    December, 2021 - present

  • Loan Advisor

    October, 2020

  • Agent Success Manager

    July, 2020

  • Licensed Local Expert

    August, 2019