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also known as David Marshall Datz PC, real estate attorney
Ryan practices residential real estate law and effectively represents buyers, sellers, and lenders. His legal experience ranges from a solo-practitioner law firm to the General Counsel's Office of the Boston Public Health Commission (BPHC), the nation’s first Public Health Commission, where Ryan advised and defended the agency’s approximately 1,800 employees and litigated in Suffolk Superior Court. While at BPHC, he wrote substantial portions of a successful and precedent-setting legal brief before Massachusetts Court of Appeals. Ryan is also former small business owner and a licensed Massachusetts Real Estate Broker. He earned a Bachelor of Science degree in Business Administration from Babson College and a Juris Doctor degree from Suffolk University Law School.
Prior to joining Datz Law, Ryan ran a successful real estate law practice with Ligris + Associates for over seven years. Before joining the bar, Ryan worked in Global Marketing and Communications at Reebok International Ltd. World Headquarters where he helped oversee and create international marketing campaigns. He also interned with the Commonwealth of Massachusetts Office of the State Auditor where he assisted in large educational audits of the Commonwealth’s public universities.
Using the unique skill sets he has obtained from these diverse industries, Ryan creates dynamic and efficient problem-solving solutions to more effectively advocate for the interests of his clients.
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Practice Areas
15 years
8 years
Free Consultation
$0 first 30 minutes
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Chat withState: Massachusetts
Acquired: 2012
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530 Tremont Street, Boston, MA, 02116
167 Commercial Street, Provincetown, MA, 02657
179 Cranberry Highway (MA-6A), Orleans, MA, 02653
44 Client Reviews
Showing 1 - 5 of 19 reviews | Practice Area Knowledge
Posted by Sabatino | December 23, 2025 | Hired Attorney | Real Estate
Attention to detail & timely completion of home closing
Choosing Ryan's services for our home closing was a great decision. We felt we were in good hands every step of the way. Ryan's attention to detail is fantastic, and we ended up being ahead of schedule to close sooner than expected. Thank you!
Thank you so much for the kind words! I truly appreciate you taking the time to share your experience. It was a pleasure representing you, and I’m glad you felt supported and well-informed throughout the process. Congratulations again on your new home, and I wish you all the best as you settle in. If I can ever be a resource down the road, please don’t hesitate to reach out!
Posted by Daniel | May 30, 2025 | Hired Attorney | Real Estate
Consistently Outstanding Experiences!
As a realtor, I’ve had the privilege of working with and getting to know Ryan. I am beyond thrilled with the experiences I have had collaborating with him, and I know that my clients all feel the same! Ryan is knowledgeable, responsive, trustworthy, timely and is a genuinely nice person! His org...
Daniel, thank you so much for the generous testimonial. It means a great deal coming from a professional as dedicated as you. I take great pride in bringing a high level of expertise, attention to detail, and strategic foresight to every transaction. My goal is always to protect my clients' interests, prevent surprises, and make the process as smooth as possible — and I’m glad that’s been your experience. I truly value our partnership and look forward to continuing to support you and your clients with the same level of care and commitment.
Posted by Ariella & Ben | April 21, 2025 | Hired Attorney | Real Estate
We cannot recommend Ryan highly enough!
Ryan and his team went above and beyond for us throughout our home purchase. While bending over backwards to ensure every detail was correct and working with difficult outside parties, he remained professional, positive, and delightful. We will be coming to Ryan with future needs and highly recommend...
Thank you so much for your incredibly kind words! It was truly a pleasure working with you throughout your home purchase. I'm grateful for the trust you placed in me and my team, especially during a process that can sometimes be stressful. We always strive to provide clear, thorough, and responsive support, and it means a lot to hear that you felt well taken care of. I look forward to assisting you again in the future and sincerely appreciate your recommendation! Warm regards, Ryan
Posted by Chisom | March 31, 2025 | Hired Attorney | Real Estate
Ryan Cunningham
It was a pleasure working with Ryan for the purchase of my first home. He was referred to me from a friend and certainly lived up to expectations. He explained the whole process to me, was patient and allowed me to ask questions as needed. He made the home buying process so much easier. I am very gla...
Thank you so much for your kind review, Chisom! It was a pleasure working with you throughout the home buying process. I’m glad I could help explain every step and make the journey smoother, especially as you purchased your first home. Your trust means a great deal, and I’m thrilled to hear that you’re considering me for your next purchase. Congratulations on your new home, and I look forward to the opportunity to work with you again in the future!
Posted by Bryan | June 10, 2023 | Hired Attorney | Residential
Made my first home purchase easy
Ryan helped me close my first ever home purchase. He was extremely detail oriented, efficient, and conscientious. He even saved me hundreds money by realizing that I was being charged for insurance I didn't need. Overall, working with Ryan Cunningham was a pleasure
Thanks Bryan! I appreciate the kind words and your endorsement of my services. Congrats again on your purchase!
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2020
Clients' Choice Award, Avvo
2019 - Present
Attorney, David Marshall Datz, PC
2012 - Present
Attorney, Ligris & Associates, PC
2011 - Present
Massachusetts Bar AssociationMember
2011 - Present
Boston Bar AssociationMember
2011 - Present
Massachusetts Lesbian and Gay Bar AssociationMember
Successful Defense against Big Tobacco
2011
JD - Juris Doctor
2006
Business Management
2019
2011
English