About Jonathan Kosow
Jonathan Kosow is an Area Sales Manager at Guaranteed Rate Affinity — an accomplished sales executive and inspirational business leader with over three decades of expertise in mortgage lending, sales strategy, and business development. Jonathan leads by example, maintaining an active book of business built the old-fashioned way — through referrals from past clients who have become friends over the years, and by becoming a trusted resource within some of New York's top real estate teams. Known for fostering environments where individual growth thrives within collaborative team dynamics, he brings that same hands-on approach to his leadership role — building a culture where sales and operations work seamlessly together. His client philosophy is simple: buyers should be comfortable with their payment at today's rate, not banking on a refinance that may never come. When he's not helping clients or leading his team, Jonathan can be found on Shelter Island with his wife, kids, and two doodles — or on the tennis court, on stage doing improv, or working on his stand-up bit. From pre-approval to offer, from locked rate to clear to close — your partner in the most important purchase of your life.
