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A full-service law firm for injured workers and
professionals in New York and New Jersey

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Michael Kalmus Attorney at Law provides expert legal support and representation to workers in NJ in matters relating to personal injury, disability retirement pensions, social security disability, worker’s compensation, veterans disability claims, disciplinary claims and more

We offer personalized and aggressive legal representation to our clients. Our firm has successfully obtained disability benefits for union workers, police officers, sanitation workers, firefighters, corrections officers, federal workers, etc. We have a diverse clientele and our firm is always sensitive to the special needs of our clients.

Kalmus - New Jersey Pension Disability Appeals Lawyer

Attorney Michael L. Kalmus

Michael Kalmus has spent his entire career fighting for the rights of the individual. He is a recognized expert in medical claims, successfully representing thousands of individuals seeking social security disability, disability retirement pensions, benefits under private disability insurance policies, workers compensation benefits, veterans benefit, and personal injury claims. In addition, Michael has represented employees in all manner of disciplinary proceedings, mediations, arbitrations, contract negotiations, and labor/management disputes. He is, in addition, well known for his expertise in advocating on behalf of victims of sexual abuse.


Michael Kalmus has spent his entire career defending the rights of workers, helping thousands of people obtain millions of dollars in benefits along the way.

After graduating from New York University and the Benjamin Cardozo School of Law, Michael began his career as a labor lawyer, working on behalf of multiple New York City and State Labor Unions and their members. After several years in the field, he pursued a specialization in all things medical and developed a stellar reputation in the area of disability pensions, social security disability and private long-term disability claims. In the aftermath of 9/11, he helped numerous individuals who served at or near the World Trade Center site to obtain upgraded disability retirement pension benefits when the physical or psychological impact of their service became apparent, often years later (he is now helping New Jersey workers obtain similar benefits
pursuant to more recently passed legislation).

In recent years, Michael served as General Counsel to a national firm specializing in Social Security Disability benefits. He is also working with a team of attorneys representing victims of childhood sexual abuse.

Michael is married with one child and lives in Essex County, New Jersey. In his leisure time he is an avid sports fan, occasional golfer, and student of stand-up comedy.

natalyn jeffries

Natalyn Jeffries

Natalyn Jeffries is an SSD Client Advocate at Markhoff & Mittman.  Her practice focuses on social security disability. Natalyn’s legal career began in 1985 at Hopkins & Sutter in Chicago, Illinois (now Foley & Lardner) where she worked as an entry level legal assistant.  She obtained her paralegal certification in 1994 and went on to work at law firms in Houston, Texas and Atlanta, Georgia as a litigation paralegal.  She began her career in client advocacy in 2016.  After receiving accreditation to represent clients at the hearing level for Title II and Title XVI claims, Natalyn has won cases for clients throughout the United States. Natalyn is an active and participating member of the National Association of Disability Representatives (NADR), a specialized organization that is concerned about and contributes to disability policies and legislation. "I believe in aggressively pursuing disability benefits for my clients.  They are shining examples of what it means to be brave in the direst of circumstances.  It is my privilege and honor to serve them and deliver the best results possible.  I am fueled by my commitment to excellence and will always go the extra mile to make sure my clients are fully satisfied with the service I provide to them."
Kimberly Del Prado

Kimberly Del Prado

Kimberly proudly works as a Senior Social Security Disability Case Manager. She has held various positions with Markhoff & Mittman, PC The Disability Guys since 2013 when she started out as a File Room Clerk. A constant learner, Kimberly worked her way up through the office and now directly helps clients and their families obtain the benefits they deserve each day.


Kimberly is outgoing and values the trust and bonds she creates with her clients. In 2017 Kimberly was awarded the Westchester County Mili Award recognizing standout local young professionals aged 21 to 34. Kimberly lives in Westchester, NY with her fiancé and 2 year-year old daughter.

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ATTORNEY ADVERTISING. This website is for informational purposes only and should not be considered legal advice. Use of this website does not constitute the formation of an attorney-client relationship. Results may vary from case to case depending on the specific circumstances of the case. This website has not been approved by the Supreme Court of New Jersey. 

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