About Us

With over 40 years of combined management experience in the legal/mortgage servicing industry, Jennifer Warren and Hallie Greene have successfully navigated through a multitude of ever-changing rules, regulations and trends. Together, they helped build and run the largest law-firm in New York state that focused on creditors' rights, mortgage default and loan servicing law. Jennifer and Hallie are well known for their dedication to their clients, work product and integrity. They both have a passion for business, process improvement, management and tackling challenges to ensure success. It is obvious to anyone that has worked with them that they have a true partnership, strong worth ethic and a love for what they do. Jennifer and Hallie are excited to continue their professional journey as principals of Warren Greene Management and Consulting, LLC. and look forward to sharing their enthusiasm with you.


WGMAC is happy to offer the following menu of services dedicated to increasing your organization’s efficiency, productivity and accuracy. We utilize our extensive experience and combine that with maximizing technology to achieve extraordinary results at minimal costs to our clients.

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Meet the Team


Jennifer Warren and Hallie Greene


Jennifer Warren

Jennifer Warren is a well- recognized operations leader in the creditors’ rights industry. Jennifer began her career as a file clerk in 1998 after obtaining her Paralegal Certificate. She was soon promoted to Assistant Office Manager where she led the start-up of a new office for a large law firm. Jennifer’s drive, dedication and work ethic helped her to rise to top tier management within her firm, landing as the Director of Operations. Read More


Hallie Greene

Hallie Greene majored in Computer Engineering while attending S.U.N.Y. New Paltz in upstate New York. She later received a certificate in paralegal studies from C.U.N.Y Queens College, where she was the recipient of the 2000 West Legal Studies Award for Outstanding Achievement. Read More


“I had the pleasure of working directly with Hallie Greene and Jennifer Warren for many years in the mortgage default servicing area of law.  They are two of the most creative women I have ever met! Both have the ability, experience and special gift to rapidly identify and assess issues and successfully implement systems and processes for Attorneys to streamline, effectuate and accurately process work.  I highly recommend and trust them to aid with any firm that strives to implement an improvement within its systems!”

-Lisa B. Singer, Esq., of counsel to Lori R. Somekh and Associates and Lisa B. Singer, PLLC

"I give my highest recommendation to Hallie Greene and Jennifer Warren. The two of them can always be counted on to improve processes and make things run smoothly. I have known both of them for twenty years, and I know first-hand how intelligent, devoted and creative they both are. If you are an attorney looking to revitalize your organization, Hallie and Jenifer are the absolute best choice."

-Craig Wolfson, Esq., Partner, Wolfson and Klein-Wolfson, PLLC

"I offer my recommendation to Hallie Greene and Jennifer Warren. As a servicing manager, I have worked with both of these women in many capacities within the mortgage industry. They both have extensive knowledge in the industry and are well recognized for their default experience including organizational structure, business systems and process improvements. Hallie and Jennifer provide stellar customer service with their ability to be forward thinkers and trusted advisors. Warren Greene Management and Consulting, LLC have my very highest recommendation."

-Elizabeth Korgar, Business Process Manager, IBM

"Jennifer and Hallie are two of the most professional and courteous individuals that I know.  I have had the pleasure of working with them for over 15 years now in the mortgage default servicing arena.  No matter the issue, Jennifer and Hallie have a solution.  Their work ethic is second to none.  They are always available to take care of their clients’ requests, no matter how early in the morning or how late at night the requests come into their world.  Jennifer and Hallie are extremely positive individuals that never let the “madness” of their day get to them.  They project a contagious positive attitude that is always a pleasure to be around. 

I have worked with hundreds of individuals in the same role as Jennifer and Hallie over the last 20 years.  You would be hard pressed to find someone of their caliber in this day and age.  If excellence and professionalism is what you are after, you will get that when you work with Jennifer and Hallie."

-Robert Michalik, Vice President of Foreclosure, Caliber Home Loans

“I found myself in a difficult situation, we were not meeting the expectations of our client. I looked to Jennifer Warren, Hallie Greene and their teams to review our processes and determine where we could make changes. It was not easy, but we were able streamline several steps within the process to improve our SLA’s and meet the expectation of our client. Jennifer & Hallie continuously looked for ways to improve the processes to meet evolving business and client needs. As leaders, their professionalism, caring attitude and dedication to their work and the people that they impact are truly remarkable. I highly recommend Jennifer and Hallie to anyone looking to improve their operational processes."

- Bryan Beckler formerly Seterus, VP Default Management Administration

"As someone who has been in the default servicing industry for more than 20 years, I have encountered individuals with little to no experience up to the senior ranks of management. Throughout those experiences there are a few people who have left a lasting impression. Jennifer Warren and Hallie Greene are two of those individuals. It is without hesitation that I recommend and furthermore, encourage anyone seeking to improve their organization to pursue the experience, knowledge, work ethic and dedication of these individuals."

- Stephanie Sevier, former mortgage servicing manager and law-firm executive

“I am so glad we made this decision"

“Warren-Greene Management and Consulting, LLC. takes the time to know what the issues are and help see the problem through to its resolution. They have amazing compliance knowledge in the Default Industry and are wonderful to work with during what is usually a stressful and wearisome time.  We have not doubted our decision for a second in choosing Warren-Greene and are looking forward to a lasting relationship.”

-Cecilia Synco Keathley, Director of Operations, Mickel Law Firm, P.A. (AR, MS, TN, TX)

"I had the privilege of working with Warren Greene to launch our foreclosure department in New York.  Jennifer Warren has a vast knowledge of New York foreclosure law, and understands the intricacies of the practice.  She worked hard from start to end, developing training materials, procedures, slides, and integrating a Case Management system to New York practice.  It was a pleasure working with Jennifer, and we greatly benefited from having her develop our foreclosure system.  Hallie Greene has extensive knowledge on the bankruptcy side, and developed our templates and Case Management integration for bankruptcy."

"I highly recommend any firm with a New York practice to work with Warren Greene.  Their professionalism and knowledge of New York practice and Case Management technology can assist any firm in being able to develop their systems and launch the practice in an efficient, professional, and thorough manner."

-Joseph G. Devine, Jr. Esq., Managing Attorney, Tromberg Morris Poulin, PLLC





Pricing varies according to volume and scope of services.  Packages include subscription based pricing as well as individual project pricing.

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