Alexis Sierra
Licensed Real Estate Salesperson

As the real estate platform within Strata Alliance’s integrated model, Strata Realty delivers the market insight and transactional expertise needed to support strategic property decisions. From in-house brokerage services guiding the purchase and sale of residential and commercial assets to commercial leasing and multi-family project representation, our team empowers clients with clear, disciplined execution.
Whether advising individual investors or partnering with developers across Long Island, we provide access to capital, municipal relationships, and operational resources that elevate opportunity. By integrating brokerage capabilities with development support and back-office infrastructure, we bring clarity to complexity—ensuring every transaction advances broader investment and growth objectives.


Alexis Sierra is a multi-million dollar producing agent serving clients across Long Island, New York City, and Westchester County. With over five years of experience in residential and commercial transactions, she brings a disciplined, results-driven approach to every engagement — from first-time homebuyers to seasoned investors.
Alexis has been recognized for her achievements in the field, including coverage in the New York Post for a notable 2022 transaction. Known for her discretion and market expertise, she has built a reputation as a trusted advisor for clients who demand confidentiality and precision. Her deep knowledge of the Long Island market, combined with access to Strata Realty’s broader network and resources, ensures clients are positioned for success at every stage of the transaction.


Stephanie McGrath serves as Head of Property Management at Strata Realty, bringing 15 years of operational leadership across the Strata organization. Her expertise spans commercial brokerage, construction project oversight, day-to-day property operations, and the development and management of annual property budgets.
A licensed New York State Real Estate Salesperson, Stephanie takes a solutions-focused approach to every client relationship — working closely with landlords, tenants, and property owners to align operational strategy with long-term financial goals. Her unique combination of business management acumen and commercial real estate expertise enables her to navigate complex challenges with clarity and deliver consistent results for all stakeholders.