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Our New York Team

  • Glenn Mattson
    President of Mattson Enterprise in New York The company provides on-going support, reinforcement and networking through an alliance of business and sales professionals. Glenn helps individuals who are on their own, or part of a larger organization, overcome the roadblocks keeping them from reaching their definition of success. He feels if you know the "Why" you can overcome the "How." Glenn follows a simple process of defining where his client wishes "to be" in comparison to his/her current "as is" status.
  • Mary Anne Iannizoto

    Mary Anne serves as a key tactical partner to Glenn Mattson, Founder and Principal of MEI. In this role, she supports the development of training presentations and execution of strategies, programs, tools and other critical sales training deliverables that drive the growth of MEI clients and the firm.

    She has extensive experience in the financial services sector with a career spanning both field sales support and home office. Mary Anne began her journey at The Equitable in Corporate Human Resources, where she was responsible for recruiting and staffing. She later transitioned to Field Development, spending over eight years supporting 4,000+ financial sales reps and over 300+ sales managers, directing national recruiting and management development efforts for Equitable Advisors (formerly AXA Advisors). From there Mary Anne assumed the role of Chief of Staff to the Chairman and Chief Sales Officer, where for six years she played an integral role in planning, communicating and implementing growth strategies for retail distribution.

  • Sean Mattson

    I work with sales professionals across multiple industries, with a primary focus on financial advisors and insurance professionals.

    My work centers on helping clients increase their average case size, move up market, and gain greater control over their sales conversations. I specialize in strengthening sales language, establishing equal business stature, building more predictable pipelines, and reducing common roadblocks such as “think-it-overs,” price resistance, and stalled decisions.

    I believe sales should be disciplined, intentional, and measurable. My approach is practical and direct, focused on real-world execution rather than theory. I work with clients who want their results to reflect the level of effort, professionalism, and value they bring to the marketplace.

  • Christine Arina

    As an experienced Executive Assistant to a top-performing Sales Leader, I play an integral role in keeping daily operations organized and running efficiently. I manage a fast-paced and constantly evolving calendar and serve as a reliable point of contact to ensure clients receive timely information and support. I take pride in creating a seamless experience for both our internal team and external partners by anticipating needs and handling details with care. With a strong focus on organization, communication, and efficiency, I help keep the office running smoothly and allow the sales team to stay focused on building strong client relationships. I really enjoy being a part of a team that helps individuals reach their fullest potential.

  • Ellen O'Mara

    Ellen is the Account Manager at Mattson Enterprise Inc. and serves as the primary point of contact for clients throughout their engagement. She ensures a smooth and organized experience from agreement completion through onboarding, scheduling, and program delivery.

    Ellen supports client communication, manages assessments and reporting, coordinates access to training resources, and oversees the secure delivery of materials and recordings. Her role is focused on clarity, responsiveness, and follow-through—helping clients stay informed, supported, and confident at every stage of the process.

  • Cordae Mattson
    As part of the marketing and enablement team at Mattson Enterprise Inc., I specialize in turning strategy, sales training principles, and leadership insights into high-impact content. I work closely with Glenn Mattson to develop articles, scripts, social media content, newsletters, and marketing materials that support both brand growth and client engagement.
  • Anthony Bosio

    Anthony Bosio works with financial advisors and sales professionals to strengthen the human side of the sales conversation—where mindset, language, and decision-making determine whether progress moves forward or stalls.

    His focus is on helping clients recognize and shift the internal dynamics that drive hesitation, resistance, and objections. By improving how questions are asked, how beliefs are surfaced, and how conversations are framed, Anthony helps sales professionals create stronger commitment and more consistent outcomes by shifting the focus from call volume to the quality of each conversation.

    Anthony’s passion for high-level communication, sales, and leadership began in his family’s business, where he saw firsthand how poor communication and unskilled selling led to stress and missed opportunities. That experience shaped his belief that effective selling is less about doing more and more about developing the skills that naturally lead people to want to buy.

    His approach aligns closely with Sandler’s core philosophy: selling with integrity, building mutual understanding, and creating long-term client relationships