440 Mamaroneck Avenue Suite 504
Harrison, NY 10528



Our President, Sarah Jones-Maturo, was a transactional office broker for 12 years before she joined RM Friedland. As a tenant representative we believe in a methodical three phase process to ensure that your new corporate home is optimal. As a landlord representative we do not wait for a tenant to come to us. We canvass tirelessly to ensure that we get the asset leased up.

RMF’s Office Division Stats

Since 2009


Years of Experience


Total transactions Closed

1.5 Million Square Feet

Total Transaction Size

$159 M

Total Transaction Value

Meet Your Office Team

Chris O’Callaghan

Managing Director
Office Division

Chris O’Callaghan

Managing Director
Office Division
Chris joined RMF in October of 2020 as its Managing Director of the Office Division. Chris will be spearheading the office division’s growth working on recruiting and various business development initiatives. Chris has been one of Westchester’s most prolific office brokers over the past couple of decades.

Prior to joining RMF, Chris served as Managing Director of JLL. Chris has negotiated many of the most significant real estate transactions in the region, involving such companies as AT & T, New York Life, Snapple, White Plains Hospital, Waterhouse Securities, TRIARC, Metropolitan Life Insurance, Emcor Group, Inc., Morrow & Company, State Street Bank, Hitachi, Business Council of Westchester and United Technologies, to name just a few. Mr. O’Callaghan has negotiated lease and sale transactions valued at over $1Billion involving over $20 million square feet.

Mr. O’Callaghan is the former Chairman of the Board of the Business Council of Westchester County, which represents over 1,200 member businesses in Westchester County and New York State. He is also the former Chairman of the Westchester Economic Development Business Coalition. Mr. O’Callaghan has served on the Boards of NAIOP (The National Association of Industrial and Office Parks), the Food Bank of Westchester, The American Red Cross, Greenwich Hospital, and United Hospital Medical Center. Additionally, Mr. O’Callaghan has served as President of the Friendly Sons of St. Patrick of Westchester and is also a member of REFA (The Real Estate Finance Association).

Chris and his wife live in Rye, New York, and have four daughters.


  • Former Chairman of the Board of the Business Council of Westchester County
  • Served on Board of NAIOP
  • Member of REFA (The Real Estate Finance Association).
  • Former Chairman of the Westchester Economic Development Business Coalition

Notable Transactions

  • Morgan Stanley750,000-s.f. Purchase of former Texaco Headquarters; Purchase, NY
  • Prodigy Services340,000-s.f. 445 Hamilton Avenue, White Plains, NY
  • Atlas Air120,000-s.f. Lease at 2000 Westchester Avenue, Purchase, NY
  • Cadbury Schweppes135,000-s.f. 900 King Street, Rye Brook, NY
  • Greenwich Hospital75,000-s.f. 900 King Street, Rye Brook, NY

Stephen Kaufman

Vice President
Associate Broker

Stephen Kaufman

Vice President
Associate Broker
Stephen Kaufman is an associate real estate broker at RM Friedland, LLC focusing on the Bronx and Westchester counties. He has completed deals with medical groups, children’s and adult day care centers as well as with numerous retail and general office users. He has represented both landlords and tenants as well as buyers and sellers of commercial properties. Stephen has a reputation of finding space for even the most specialized of uses. He is tenacious in his efforts throughout the deal process and prides himself on both his ongoing communication with all parties and his high ethical standards. Prior to entering commercial real estate brokerage, Stephen was a plumbing and mechanical contractor specializing in institutional work including hospitals and schools.


  • University of Pennsylvania, Triple Minor in English, Chemistry, Science and Society
  • Columbia University, MBA with a concentration in Real Estate and Finance
  • Licensed Real Estate Associate Broker, New York
  • Member of ICSC

Notable Transactions

  • Leasing Activities
  • 151 E Tremont Avenue, Bronx Supermarket
  • 33 Trinity Street, YonkersWestchester School for Special Children
  • 358 E 149th Street, BronxMaximus
  • La CentralLargest Mixed-Use Project Underway - Ongoing Assignment
  • Sales Activities
  • 51 Smart Avenue, YonkersOffice Building
  • 1009 W Boston Post Road, MamaroneckOffice/Retail Building
  • 175 City Island Avenue, BronxIndustrial/Office Building

Jillian Reiner

Real Estate Salesperson

Jillian Reiner

Real Estate Salesperson
Jillian Reiner is an associate in RM Friedland’s office leasing division. Recognized throughout the county as an emerging young professional, Reiner represents both landlords and tenants. A key goal of hers is to build long-term, mutually beneficial, strategic relationships that will lead to her continued success and enable the firm to distinguish itself as a market leader in the Westchester County marketplace.

Reiner grew up in a real estate family and understands the real estate business. Her father operates a boutique commercial real estate company on Long Island. For years, Jillian has been alongside her father, his associates and partners learning about the business from deal selection, through to execution and ongoing management of residential and commercial properties.

Jillian is a self-starter who works best knowing what the responsibilities and goals are. Once on a project, she has been complimented for being able to recognize the big picture in anticipating the requirements of customers, clients, managers and her team. Reiner has a creative eye as well as a logical business skill set. She has enjoyed great satisfaction utilizing her education and passion in creative concept and presentation, the use of social media, market research, and deal execution.

Prior to her beginning her career in Real Estate, Jillian graduated with a Bachelor of Science in Advertising and Marketing Communications from the Fashion Institute of Technology.

Reiner grew up in the seaside community of Sag Harbor, New York and now resides in Armonk, New York.


  • Fashion Institute of Technology, Bachelor of Science in Advertising and Marketing Communications
  • Licensed Real Estate Salesperson, New York and Connecticut

Notable Transactions

  • 50 Main Street, White Plains, NY 309,000 SF, Lease
  • 22 Saw Mill River Road, Hawthorne 45,000 SF, Lease

Our Office Clientelle Include