The Art of Real Estate
About da Vinci Realty
More ABout Us
Our Values
Integrity
Honest, transparent guidance at every step.
Expertise
Backed by decades of experience, results, and global credentials.
Community
Investing in the future of Northern Arizona, one property at a time.
Commitment
Dedicated to client success, whether it’s one transaction or a lifetime partnership.
Commercial Properties Sold in Arizona
Years of Combined experience
At da Vinci Realty, we believe real estate is more than a transaction—it’s about trust, opportunity, and creating lasting impact. Since 2003, we’ve helped clients maximize investments, build portfolios, and find spaces where businesses and families can thrive.
We’re proud to be a full-service commercial real estate company, offering:
- Commercial sales, leasing & commercial property management
- Residential sales & investment support
- Land speculation & partnership opportunities
With over 100 years of combined experience, our team blends deep local knowledge with national and international reach through the CCIM network. Our clients know they can rely on us for integrity, expertise, and results.
Team
Mark T. Belsanti, CCIM 
Founder / Owner / Commercial Agent
With 35+ years in commercial real estate and a CCIM designation, Mark brings global connections and proven expertise to every deal. His background as a Sedona Planning & Zoning Commissioner and co-founder of da Vinci Realty speaks to his dedication to community and client success.
More About Mark:
Mark has been an active commercial real estate agent for over 20 years. He has enjoyed much success through those years; transacting commercial real estate in Flagstaff, Sedona, the Verde Valley, and Scottsdale, Arizona. In 1999, he attained the Certified Commercial Investment Member (CCIM) certification. This certification is one which separates a commercial real estate agent from the general real estate agent. A CCIM is a recognized expert in the commercial and investment real estate industry and a CCIM is part of a global commercial real estate network with members across North America and more than 30 countries. This professional network has enabled CCIM members to close thousands of transactions annually, representing more than $200 billion in value. As a result, the experts who possess the CCIM designation are an invaluable resource for commercial real estate owners, investors, and users.
As well, Mark served as a Planning and Zoning Commissioner for the City of Sedona for three years prior to relocating to Flagstaff, Arizona in 2003. At that time, he started da Vinci Realty with his wife, Leslie.
Leslie Belsanti
Founder / Owner / Broker
Leslie combines a strong background in real estate development and management with decades of brokerage leadership. As the company’s Broker, she oversees operations while continuing to serve residential and commercial clients throughout Northern Arizona.
More About Leslie:
Leslie has been involved in commercial real estate and development since 1996. Leslie is a graduate of Northern Arizona University and has spent most of her adult life and real estate career in Northern Arizona after many years in the management side of the hospitality industry on Mackinac Island, Michigan and in Sedona, AZ.
It was in Sedona that Leslie started her real estate career. Beginning in the financial management side of the development business, Leslie then took on the brokerage side of real estate managing agents, employees and partnership relationships. In 2002, she went on to attain her CRB (Certified Real Estate Brokerage Management) designation and in 2003 she furthered her credentials by gaining her Broker designation and started da Vinci Realty, LLC. Leslie is the Broker of the company and oversees all the business affairs of the company; including the management of agents and employees, marketing, advertising, and accounting.
Since the inception of da Vinci Realty, Leslie has been handling any residential real estate needs. And, in 2013 opened an official Residential Division of the company to not only continue to service our commercial clients’ needs but to meet the market demands of the real estate industry in both Flagstaff and Sedona.
Leslie serves on the board of the Flagstaff Downtown Business Alliance. She and her husband, Mark, also own and operate a coworking space in Downtown Flagstaff, where da Vinci Realty is located.
Donna Siebert
Operations Director
With 30+ years in property management, Donna has led teams at top firms like CBRE and Brixmor. Her expertise in financial reporting, lease administration, and capital improvements ensures clients maximize value and peace of mind.
More About Donna:
Donna Siebert, CPM, RPA, CSM joins da Vinci Realty with over 30 years of commercial property management experience in the Arizona and California markets, working for Real Estate Investment Trusts and some of the top management companies including CBRE and Brixmor Property Group. Ms. Siebert has a proven track record of successfully maximizing revenue while creating and sustaining valuable relationships with tenants and clients. Donna has extensive knowledge and experience in financial reporting, lease administration, expense control, risk management, capital improvement implementation, tenant buildouts and relationship building.
Donna is a graduate of Arizona State University with a bachelor’s in education. She earned the Certified Property Manager designation through the Institute of Real Estate Management; was accredited the Real Property Administrator from the Building Owners Management Association; as well as, received the Certified Shopping Center Manager designation from International Council of Shopping Centers.
Rosa Leonardis
Commercial / Residential Agent
Rosa Leonardis is a licensed real estate professional, licensed in Arizona since 2013, with over a decade of experience specializing in commercial, investment, and one-of-a-kind properties throughout Northern Arizona, including Flagstaff, Sedona, and the Verde Valley.
More About Rosa:
Raised in Northern Arizona, Rosa brings a deep-rooted understanding of the region’s evolving market, land use dynamics, and long-term growth patterns.
Her practice is focused on identifying and maximizing value in income-producing assets, specialty-use properties, mixed-use opportunities, land, and distinctive real estate that require a strategic and knowledgeable approach. Rosa’s success is driven by her strong local insight, extensive market knowledge, and meticulous attention to detail—critical qualities when navigating complex commercial and investment transactions.
Rosa understands that commercial and unique property acquisitions represent significant financial commitments. She approaches every transaction with diligence, precision, and a results-oriented mindset, ensuring her clients are informed, protected, and positioned for success at every stage of the process.
Whether you are buying, selling, leasing, or investing in commercial real estate, specialty properties, land, or distinctive assets in Northern Arizona, Rosa Leonardis is a trusted advisor you can rely on.
Contact the professionals at da Vinci Realty to discuss your commercial or investment real estate needs.
Meredith Johnson, CPA
Controller
Meredith Johnson, CPA oversees all bookkeeping and financial reporting for the firm’s commercial property management portfolio. With over 20 years of accounting and audit experience, Meredith brings institutional-level financial rigor to locally managed commercial assets.
More About Meredith:
A Certified Public Accountant, Meredith holds both a Bachelor of Business Administration in Accounting and a Master of Science in Accounting from Texas A&M University. Her background spans senior auditing, complex multi-entity accounting, and hands-on property management financial operations, providing a deep understanding of both compliance and real-world asset management.
At da Vinci Realty, Meredith safeguards client trust accounts, delivers clear and timely financial reporting, and upholds the highest fiduciary standards. Her precision, transparency, and commitment to accuracy give property owners and investors confidence that their assets are managed with integrity and care.
Jack T. Belsanti
Valleywide Property Specialist
Turning 23 years of top-tier sales experience into real estate success, Jack joined his family’s well-established agency serving Flagstaff, Sedona, and the Verde Valley. Now, he is expanding their reach into the East Valley, helping clients navigate residential sales, commercial sales, leasing, property management, and investment opportunities with confidence.
More About Jack
A Chicago native who grew up in Sedona and Flagstaff, he has called Arizona home for most of his life. He lives in Queen Creek with his wife—also a licensed agent—and their four children. Family, community, and the outdoors are at the center of everything he does.
He combines proven sales expertise with a client-first mindset to deliver honest, results-driven guidance. Whether clients are buying, selling, leasing, or investing, he is here to turn their real estate goals into reality. Your success is his priority!
Janice Belsanti
Licensed Real Estate Agent | E. Valley
Janice Belsanti is an Arizona native, dedicated wife, and proud mom who is passionate about helping clients find the perfect place to call home. Having grown up in the Phoenix metro area and now residing in Queen Creek, she brings a deep understanding of the East Valley’s communities and what makes each one unique.
More About Janice:
Before transitioning into real estate, Janice built a strong professional foundation in the automotive industry, where she spent years developing exceptional customer service and sales expertise. Her experience includes roles as a Service Advisor, Sales Agent, and Customer Service Manager—positions that sharpened her ability to communicate effectively, manage complex transactions, and consistently deliver a high level of client care.
Today, Janice applies those skills to real estate, guiding buyers and sellers through every step of the process with professionalism, attention to detail, and a personal touch. She is known for making transactions feel smooth, simple, and even enjoyable, while always advocating for her clients’ best interests.
With her local knowledge, strong work ethic, and commitment to building lasting relationships, Janice is a trusted partner for anyone looking to buy or sell in the East Valley.
Lyza Jessee
Product Marketing Strategist
As da Vinci Realty’s Product Marketing Strategist, Lyza Jessee plays a vital role in advancing the company’s real estate presence throughout Northern Arizona, Sedona, the Verde Valley, and the Phoenix Metropolitan area. With a strong foundation built on leadership, strategic planning, and performance-driven execution, Lyza brings a results-oriented approach to marketing properties for sale, investment opportunities, leasing services, and commercial property management.
More About Lyza:
Her exceptional attention to detail ensures that every marketing initiative reflects the professionalism, quality, and expertise that clients expect from da Vinci Realty.
Lyza is responsible for developing and implementing marketing strategies that position da Vinci Realty as a trusted resource for sellers, real estate investors, business owners, landlords, and tenants. From creating compelling property presentations and investment marketing materials to managing digital campaigns and brand messaging, she focuses on delivering clear, effective communication that drives engagement and results. Her ability to organize complex projects, maintain brand consistency, and execute with precision helps showcase the unique value of each property and client relationship.
Known for her strong work ethic, creativity, and meticulous approach, Lyza ensures that every detail is thoughtfully considered—from property listings and promotional materials to market outreach and client communications. Her commitment to excellence helps strengthen da Vinci Realty’s reputation as a leading provider of real estate sales, commercial leasing, investment services, and commercial property management throughout Arizona.
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“Where the spirit does not work with the hand, there is no art.”
– Leoonardo da Vinci