Staff

Every day, the staff of OneKey® MLS identifies new opportunities to help real estate professionals succeed.

Richard Haggerty, CEO
OneKey® MLS

Richard Haggerty

Chief Executive Officer

Richard Haggerty is a New Yorker. Richard's career has taken him through many geographical stomping grounds, but it is the character of New York that he embodies. That New York resilience and resourcefulness has led him to serve in leadership positions over four decades at both local, state, and national REALTOR® association levels and at two multiple listing systems (MLSs). He has served on numerous committees, including the Professional Standards Committee and the Association Executive Committee of the National Association of REALTORS®. He has been named as one of the Swanepoel Top 200 as one of the most powerful and influential executives in the residential real estate brokerage industry. Richard has offered his guidance and stewardship on behalf of the goal of homeownership throughout his career leading him to be inducted into the Dr. Almon R. (Bud) Smith, RCE, AE Leadership Society of the National Association of REALTORS®, Inc in 2015. His empire state of mind confidently carried him through the inception of OneKey® and has helped develop OneKey® MLS into a solution that is uniquely positioned to help its customers thrive in a highly competitive and fast-paced market with constant forward momentum, a fluid strategy that finds opportunity in each iteration. It finds strength in diversity, possibility in change, and anticipates the unique needs that this culturally rich melting pot of a marketplace requires: from the “black dirt” farms of Orange County to the high rises or Manhattan, to the waterfront villages of Long Island. With Richard at the helm OneKey® MLS, they’re raising the bar for those they serve--real estate professionals and consumers alike-- reaching out for new, next, and best, knowing the status quo is not an option.


Described by his contemporaries as a “thoughtful visionary,” Richard’s comportment is distinguished by a personal dignity and respect for fellow individuals from all walks of life. He listens more than he speaks, but when he speaks, the content is considered, to-the-point, and his audience leans in so as not to miss what he has to say. A passionate and powerful speaker, who mixes gravitas with humor skillfully, Richard’s experience as a national and state instructor is displayed in his engaging presentation style and you’ll find him leading at local and industry events. His members trust and respect him and you’ll find him equally considered in his attention to a member’s concern as to a fellow executive’s greeting. Richard brings to bear the well-earned trust of his community — a feat not achieved overnight and built on a foundation of performance, integrity, and engaged listening. Richard knows how to facilitate and bring divergent concerns into alignment and exhibit willingness to put himself on the line and put himself out there in pursuit of the best outcomes for his 45,000+ customers and consumers in the Metropolitan New York Area that OneKey® MLS serves as exhibited in the 2023 acquisition of Mid-Hudson MLS.

Melissa King, COO
OneKey® MLS

Melissa King

Chief Operating Officer

Melissa King is driven. Driven by a vision of a multiple listing system (MLS) that works smarter, faster, and better for real estate professionals on both sides of the keyboard, their clients, and consumers. What does that look like? It starts with a suite of solutions that combine to create options and opportunities that equitably allow all passionate professionals the chance to thrive. Built on a foundation of impeccable data, structured with an emphasis on agile and iterative process and intuitive use, and delivered with empathy and acumen, the key to success is turning at OneKey® with this capable Chief Operations Officer on watch. With one eye on what’s to come with prominent industry insights afforded in her work co-chairing the Council of Multiple Listing Systems (CMLS) Best Practices Advisory Council (and past roles on the National Association of REALTORS® (NAR) Presidential Advisory Group (PAG) and committees), with the Real Estate Standards Organization (RESO), and as a resource consulting with other MLSs. And the other eye fully engaged on the day-to-day details of operations that deliver world-class solutions to more than 45,000 real estate professionals in the greater Metropolitan New York area. Melissa’s experience has led her up through the ranks in other prominent MLSs, working through nearly every department.


Described by colleagues as “an in-the-trenches leader,” Melissa leads by example, not stoically but enthusiastically, sharing her zest for policy and data, along with her personal vision and integrity. It is that ‘real talk,’ straight shooting with a smile approach that makes her a charismatic presence, sought-after speaker, and natural leader. Melissa sets a standard for advocacy, mentoring employees, colleagues, and family, encouraging all to see no limits to what they can accomplish with work and determination. That spirit can be traced through her own career championing data standards at MLSs’ of 80k+, finding partnership solutions at MLSs’ serving nearly 100k, and developing defining industry relationships in real estate brokerages. In her current role King stokes the engines, and steers the day-to-day operations of OneKey® MLS, removing impediments, and embodying servant leadership to the benefit of her team. If you listen closely at her next presentation or speaking event you can hear the crunch of gears as she shifts to conquer the next challenge. Melissa sees the big picture, but also understands the effort and detail required to represent all stakeholders and deliver on the work of conquering the challenges faced by those who rely on the MLS to get their everyday ‘to do’ DONE.

Paul Bassi, Chief Technology Officer
OneKey® MLS

Chief Technology Officer

Maggie Reinick, Chief of Staff, OneKey® MLS

Chief of Staff

Tricia Chirco, SVP, Marketing Communications
OneKey® MLS

Senior Vice President of Marketing & Communications

Gary Connolly, Senior Vice President of Business Development, OneKey® MLS

Senior Vice President of Business Development

Valerie Stephan, Vice President of Customer Engagement, OneKey® MLS

Vice President of Customer Engagement

Tammy Wiggins, Project Director
OneKey® MLS

Project Director

Jeff Marzo, Senior Product Manager,
OneKey® MLS

Senior Product Manager

Trish Ketelsen, Director of Marketing, OneKey® MLS

Trish Ketelsen

Director of Marketing

Gabrielle Medina, Implementation Manager
OneKey® MLS

Implementation Manager

Laverne Brown, Tier 2 Support Manager, OneKey® MLS

LaVerne Brown

Tier 2 Support Manager

Maria Casha, MLS Products Liaison
OneKey® MLS

MLS Products Liaison

Donna Lee Wimmers, Sales and Business Development Assistant, OneKey® MLS

Sales and Business Development Assistant

Share by: