Our Brokers

Dennis Hennessy SIOR
Vice President, Licensed Associate Real Estate Broker

Dennis Hennessy, SIOR has been in the Real Estate business for over 28 years. He has been Vice President of COR Brokerage, Inc. for the past 15 years. Prior to joining COR he spent 14 years with Eagan Real Estate which included being top producer for the last 5 years. Dennis received his New York Broker's License in 1987 and is also licensed in North Carolina. In those 28 years as a broker he has sold or leased well over six million square feet of space. In 1997 Dennis met the stringent requirements to join the Society of Industrial & Office Realtors (SIOR) with an Industrial designation and has held several leadership roles within the Upstate New York Chapter including being elected Chapter President in 2007-2009. In 2015, Dennis was elected Regional Director for the Northeast and is on SIOR's Board of Directors. Additionally he serves on national committees within SIOR. Past Real Estate Board positions include Board of Governors, New York State Commercial Association of Relators(NYSCAR). Dennis resides in Manlius with his wife Carol and two sons.


Dennis has significant experience in the sale and leasing of industrial properties, warehouse/distribution facilities, investment properties, and vacant land. A highlight of his career would include winning SIOR’s Largest Dollar Volume Transaction Award. Other highlights in his leasing experience would be the 596,200 SF lease of the former Ball Plastics facility in Baldwinsville, NY, along with 255,000 and 117,000 SF leases in Liverpool, NY.

Recent sales involvement would include 240,000 SF in Lyons, New York, and Baldwinsville, NY. Also he has personal involvement as a broker in 800,000 SF in Volney, NY and the 287,000 SF in Fulton, NY.

He has been the guest speaker at several Real Estate conventions along with speaking
engagements on Real Estate trends and market conditions for the Syracuse Chamber of Commerce, and the Metropolitan Development Corporation. Additionally he has been a panelist at several national SIOR conventions specifically pertaining to marketing of warehouse/distribution facilities.

email: dhennessy@corcompanies.com

Brian F Maher
Associate Broker

Brian Maher joined COR Brokerage Inc. in March 2015. Brian started his commercial real estate career as a Construction Manager in 1990 with Edgewater Companies building various commercial retail and industrial projects. In 1994, Maher joined the Pioneer Companies, as Senior Project Manager administering the design and development of numerous senior living facilities as well as commercial retail and hotel projects. In 2008, Maher joined CBD Companies as a Senior Project Manager working with tenants and building owners of numerous retail, medical and office facilities in the Greater Syracuse Market. Since 2010, Brian joined the Brokerage side of the business and has successfully worked as Tenant and Buyers Representative as well as Listing Agent for various commercial transactions. Brian resides in DeWitt, NY with his wife Kelly.

email: bmaher@corcompanies.com

Kerry Mannion SIOR
Director of Office Leasing

Kerry Mannion, SIOR, Director of Office Leasing, has been active in the commercial real estate market since he received his real estate license in 1987. Over the years he has acted as representative for many tenants such as Time Warner Inc., Brighthouse Networks, Shore Group, Robert Half, Columbian Life Insurance and many others. As exclusive representative for many downtown and suburban office buildings such as One Lincoln Center, One Financial Plaza, The Empire Building, and Collamer Crossings Business Park, to name a few, the skill set to give landlords and tenants sage advice is always present. Kerry has the SIOR designation which is only earned by those office brokers around the world who surpass the strict transaction volume and ethical guidelines required to obtain this elite designation.

email: kmannion@corcompanies.com