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Dennis W. Mulligan

Immigration Attorney at New York, NY

5.0   18 reviews
  • State Years
    New York - NY 41 years
    New Jersey - NJ 22 years
  • Licensed for 41 years
    State NY
    Acquired 1982
    Currently Registered No misconduct found
  • Licensed for 22 years
    State NJ
    Acquired 2001
    License Administratively Revoked No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Dennis

Learn Dennis’s areas of practice.

Practice areas
  1. Immigration
    Visas based on family relationships Asylum and Cancellation of Removal Immigration relief based on a history of domestic violence or other crimes Immigration cases involving crimes or fraud Representation in Immigration Court proceedings Employment-based visas Permanent residency (green cards), both family and employment based Naturalization and citizenship claims Diversity Lottery Appeals DACA USCIS Inquiries

    28 years, 1,350 cases

  2. Asylum

    28 years, 175 cases

I am an experienced immigration lawyer, legal services director and clinical legal instructor.  With a focus on family immigration, removal defense, asylum, appeals, and immigrant domestic violence cases, I also have experience in business immigration matters.  I have represented immigrants and their families from every geographic region of the world, and I speak French and Spanish.

I am admitted to practice in the State of New York, the Eastern District of New York, and the Third Circuit Court of Appeals. After graduating from Brooklyn College/CUNY in 1978 I earned my Juris Doctor degree from Brooklyn Law School in 1981.

From 1988-90 I served as a Peace Corps Volunteer in Chad, and I have lived and traveled in numerous countries of West, Central and East Africa.  From 1996 – 2001 I was Director of Immigration and Refugee Programs for a large social services agency in Trenton, NJ.  From 2001 until 2008 I was Director of Legal Services at Nationalities Service Center in Philadelphia.  During that time I managed a staff of ten attorneys and paralegals, which together handled over 1000 family immigration, asylum, removal, naturalization and citizenship, immigrant domestic violence and detention cases annually.

I was the Supervising Attorney of the student-run Asylum Law Clinic at the University of Pennsylvania Law School from 2002-2006, and from 2005-2008 I was Clinical Instructor of Temple University Law School’s Immigration Law Clinic.  I served as Executive Director of Nationalities Service Center from 2008-2013. I have served on the Executive Committee of the Pennsylvania Immigration and Citizenship Coalition and was involved in the New Jersey Immigration Policy Network. I have made presentations to lawyers, law students and paralegals on immigration law topics at numerous symposiums, conferences and trainings.

Finally, I am Of Counsel to Rupal Parikh Aristimuno, an experienced immigration attorney based in Montclair, NJ, whose expertise is centered on employment-based immigration and I-9 compliance for businesses.


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Law Firm of Dennis Mulligan
85 Broad Street
18th Floor
New York, NY, 10003


5.0 / 5.0
  18 customer reviews
5 Star
4 Star
3 Star
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1 Star
Posted by Yacouba | February 24, 2017
This review is from a person who hired this attorney.
| Hired Attorney
I appreciate his job
He helpe me in the beginning to the end always listening and helpfully thank a lot
Posted by Austin | February 11, 2017
This review is from a person who hired this attorney.
| Hired Attorney
He is the best .very knowledgeable
Before hiring mr. Dennis mulligan I consulted 4 other lawyers tho.but all the time I couldn't make myself assured that should I hire them or not. I was still in search of a good lawyer then one day I came to know about him by avvo. I thought let's make an appointment with him and talk to him.when I started to talk to him. Within 10 minutes I realize that yes he's the best and he's that was looking for.on same spot I hired him. He's so nice and simple man.believe me he has a lot of knowledge and dedication for his work. Very punctual of time. He studied my case very well and on the first hearing I won my immigration case. I don't have enough words to explain his ability in his field.he is the best immigration lawyer .
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Posted by Vasile | November 21, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Well-experienced Immigration Attorney
My immigration problems began in 2004 when I had a very bad experience with an immigration law firm that created a big problem in my case. For years, there was little progress and so I eventually hired a second lawyer but she was not able to help me. Needing legal counsel, I searched for an attorney with integrity, solid credentials, good moral character and with meaningful immigration law experience. Due to a recommendation from one of his former law students, I was fortunate enough to find and retain the highly-experienced New York attorney Dennis Mulligan. His careful analysis of my case was exceptional and the preparation extraordinary. The earnestness with which Dennis worked on my behalf was evidenced in countless telephone calls, meetings, legal correspondence, hearings’ preparation, scenario role playing, and travel to and from New York, Philadelphia and Boston – all of which he did with careful attention to every detail. Most importantly, Dennis was able to motivate and encourage me at every stage of the process - all of which ultimately led to a successful outcome - my permanent residency here in the U.S. I would highly recommend Dennis for anyone who needs an Immigration attorney who operates at the highest level of professionalism and without sacrificing the human component. Thank you Dennis. With gratitude and respect.
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Posted by Wajeeha | October 26, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Best Attorney
I consulted Mr. Mulligan for my asylum. I was so afraid to tell my story to any one but I told him everything. He listened every word carefully, make notes and explained me each and every step thoroughly and honestly. I was very much impressed with my consultation with him that I hired him. He did a complete research about my specific situation, helped me in completing my application and he did everything that he could to expedite the process because of my situation. I was in contact with him on emails and on phone calls too during the entire period of my case. He always answered my all questions and he kept me informed about every update on my case as well. He is trustworthy and very professional in his job. I would highly recommend him.
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Posted by Hector | September 25, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Successful process
I'm from Mexico and I'm 20 years old. Dennis Mulligan helped me in the process of getting my papers. He was quick and professional. I also noticed that the way he writes and presents the information is great which is very important in this business; I even use his technique at college and I get better grades. Thank you Dennis
Posted by Nozomi | September 24, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Highly recommend!!
I really appreciate him he is my life saver i was devastated my situation but he helped me out more than 100% he is so reliable and acknowledge you could trust i was so lucky to met him
Posted by anonymous | September 22, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Trustworthy Aid for Family Petition
I came across Mr. Mulligan approximately 10 months ago and he has helped tremendously with a family petition which has not been easy. I was a bit hesitant regarding the petition process and whether it was the best decision to move forward, every step of the way Mr. Mulligan was there to guide me in the right direction and assist with paperwork or any questions I may have had. We have spoken over the phone on numerous occasions and his counsel was always honest and made me feel at ease. I highly recommend Mr. Mulligan for any immigration/petition or citizenship matter as his services really are the best and his honest approach makes a tough and confusing process a bit more comforting. Thank you, Mr. Mulligan.
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Posted by Oliver Krisch | April 12, 2016
This review is from a person who hired this attorney.
| Hired Attorney
A New American.
Mr. Mulligan was attentive, knowledgable and honest during my immigration case. He was always available to me, responding to my issues immediately. He was with me through every step of the process and was always prepared. I would highly recommend him for anyone seeking immigration assistance.
Posted by anonymous | March 31, 2016
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Very good experience
Mr. Mulligan has been extremely helpful, responsive, and genuine throughout my entire experience with him. I had a Skype call with him with regards to a possible asylum case and the interference that could arise from having other immigration applications outside the US. I had all my questions answered either during the call or in his follow up emails. I highly recommend him and I will definitely use his services again.
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Posted by Olga Cardenas | January 18, 2016
This review is from a person who hired this attorney.
| Hired Attorney
fought for my US citizenship
i highly recommend Mr. Mulligan, he was very helpful during our immigration case with the US DISTRICT COURT. He always handled everything personally and i never spoke with a secretary. he fought very hard for us and put his effort into what we were dealing with. No empty promises were made. We are very pleased with his representation, he is a very honest man and greatly appreciated.
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Posted by Abraham | January 2, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Excellent and knowledgeable Service
Utilizing his immerse experience and knowledge on US Immigration and Naturalization Dennis Mulligan was able to successfully answer all my questions, filed and worked with me through the entire process of my citizenship journey. I highly recommend him for anyone seeking immigration assistance.
Posted by anonymous | February 18, 2015
Professional Review for Services Rendered
US Immigration Attorney Dennis Mulligan has a very strong and deep knowledge in US immigration proceedings with the USCIS. He has successfully prepared, filled and help me win my immigration case just recently. I recommend him for people who are seeking a seasoned lawyer with 20 plus rears of professional experience.
Posted by Fatoumata Diallo | February 17, 2015
I loved working with Mr. Mulligan, his team have been such great help to me and my family. He's there every single step of the way. I couldn't have asked for better council
Posted by Amal | February 11, 2015
A great lawyer
Dennis Mulligan is a very honest and good Lawyer, he has a long experience with the immigration paperwork as that's why I wanted him to take care of my case for my visa application . I recommend him for any immigration case, uscis , spouse , fiancée or any kind of immigrant visa .
Posted by Veronica | February 10, 2015
great lawyer
Explained to me the pros and cons of my case. Did exactly what was needed in the moment. Reviewed the forms to make sure all the information was accurate! Great job!!
Posted by Mustafa | February 10, 2015
Immigration Lawyer, Mr. Dennis W. Mulligan
I did spend good amount of time looking for an immigration lawyer in New York; if you want to save your time and obtain best value for your money and satisfaction, then, Mr. Dennis W. Mulligan is the one.
Posted by THOSTAO | January 13, 2014
I recommend Dennis Mulligan without hesitation as a trustworthy, responsive and knowledgeable immigration law specialist for your visa, green card, citizenship applications and more. My story was a bit tricky, since I was forced to flee my country in fear, with a visitor’s visa, because of the secret police and internal politics. When I arrived in the US and started gathering information about my case, a friend of mine who knew the local lawyers better advised me to meet with Dennis Mulligan, who at that time was serving as the Executive Director of Nationalities Service Center and had been head of the immigration legal program there. I still remember that Tuesday in 2011 when Dennis met with me for the first time. He brought out the summary of my story I submitted in advance and which he already knew perfectly. In a convincing voice he promised to represent me and I felt very glad then that I was obtaining assistance from one of the most recommended immigration attorneys who would help me apply for asylum status. The week after we met we started working together on the basis of a clearly defined schedule, step by step until we finalized everything after a couple of months. During the whole process, Dennis demonstrated that he really possesses strong communication and problem-solving skills. The day of the interview he was able to recall all the important details of my 32 pages affidavit and meticulously presented that complex information before the Asylum Officer. I was granted asylum status straightaway and three months later he helped bring my entire family, made up of five people, in another application which also granted them asylee relatives’ status. Mr Mulligan has experience working with people from all walks of life and countries. He can easily communicate with the appropriate embassy or the designated USICS office, follow- up all your applications, represents you in person, offer you the counsel and support you deserve.
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Posted by Eric | December 26, 2013
Experience and Reliability
My experience with Dennis Mulligan was very positive, enriching, and beyond satisfaction. I met with Dennis when he served as Executive Director of the Nationalities Service Center (NSC) in Philadelphia. A friend of mine introduced me and I am very happy he served as my immigration counsel. There is no doubt that I would recommend Dennis to anyone seeking an immigration lawyer. Indeed I have told several people about him and they are ready to meet with him based on my personal experience with him. I highly recommend Dennis for multiple reasons. First, my case (asylum application) concluded successfully and faster than expected. Second, Dennis proved to me to be very methodical. His ethics was customer-centered, meaning that he met with me at least three times before he submitted following my approval the application to USCIS. All the meetings consisted of him explaining with facts and past cases the complexities of my asylum application (j-1 visa holder) with regard to immigration regulations. I was a J-1 visa holder subjected to the two-year home residency requirements but who was at risk of persecution and torture upon returning to the Ivory Coast on the basis of political opinion. Dennis offered me insights that other lawyers did not give me. What is more the advice he gave me corroborated what i read myself. This I found very comforting and reassuring. Third, Dennis has more than 30 year of practice and he is very knowledgeable about African issues and African cultures. As a Peace Corpse Alumni, Dennis has a great command of African politics and African cultures. He reads a lot about world politics and international migration issues. He also speaks French very well also, which makes him highly reliable and trustworthy. I believe that his ability to relate to the experience of his customers enhances the quality of the service he offers. I was happy to converse with him in French during our meetings and to talk African affairs. For me, this created a secure bond. The fourth reason why I highly recommend Dennis is his belief in human development. The years he served in NSC, a non-profit organization that serves immigrants illustrates his humanism and his inclination to help immigrants and individuals become better citizens of the United States and of the World. In terms of his ethics, I commend Dennis for his promptitude and the celerity with which he kept me abreast of the communication with the immigration services and the progression of my case. Emails and phone calls were the two means he used to communicate with me as soon as it was necessary to set an appointment or to meet. When the case concluded, Dennis called me within 10 minutes of him receiving the news from the asylum office. He left a message and sent me an email immediately. Aside from my wonderful experience with him, I am also aware of the satisfaction he provided to the numerous customers that the Coalition of African Communities in Philadelphia (I am the president of this Community Based Organization) referred to him. Many reported they were happy with his work ethics. Upon his departure from NSC, the members of the Coalition honored him for his service. I highly recommend Dennis Mulligan because he is reliable, personable, and knowledgeable. He is the best immigration lawyer I have ever met and worked with. Eric, PhD -- Affiliate Faculty Loyola University Maryland President, Coalition of African Communities in Philadelphia (AFRICOM)
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Contact for Details


AVVO RATING 9.2 (Superb)

Work Experience

  • Adjunct Professor
  • Temple University School Of Law
  • 2004 - 2008
  • Director of Legal Services; Exec. Director
  • Nationalities Service Center
  • 2001 - 2013
  • Director of Immigration and Refugee Programs
  • Lutheran Social Ministries of NJ
  • 1996 - 2001


  • Bryn Mawr School of Social Work
  • Certificate
  • 2009
  • Brooklyn Law School
  • JD - Juris Doctor
  • 1981
  • City University of New York, Brooklyn College
  • BS - Bachelor of Science
  • 1978

Legal Cases

  • Matter of C-
  • Visa granted
  • Matter of E-I-
  • Motion to Reopen Granted
  • Matter of J-P-
  • Asylum Office granted asylum.
View all legal cases


  • American Immigration Lawyers Association (New York City Area chapter)
  • Member EOIR/OPLA/Asylum Liaison committee
  • 2016 - Present
  • American Immigration Lawyers Association (New York City Area chapter)
  • Member ICE Liaision Committee
  • 2016 - Present
  • New York City Bar Association, Immigration and Nationality Law Committee
  • Committee Member
  • 2014 - Present
  • American Immigration Lawyers Association
  • Member
  • 1998 - Present
  • Pennsylvania Immigration & Citizenship Coalition
  • Executive Committee
  • N/A
  • AILA New York Chapter
  • Member
  • N/A
View all associations

Languages Spoken

  • French
  • Spanish

Honors and Awards

  • Founders Award
  • PA Immigration and Citizenship Coalition
  • 2013
  • Excellence in Legal Clinical Instruction
  • Univ. of Pennsylvania Law School
  • 2007


  • AVVO Legal Guides
  • Immigrant victims of domestic violence and crimes - options for protection and legal status
  • 2013
View all publications

Speaking Engagements

  • Immigration Law Moot Court Competition
  • Moot Court Judge
  • 2016
  • 2015 Immigration Law Moot Court Competition
  • Moot Court Judge
  • 2015
  • In-Service Training, Virology Services Department
  • Immigration Law Concepts and Definitions for Medical Professionals
  • 2014
  • Community Meeting
  • Immigration Law and the Haitian Community
  • 2014
  • AILA Philadelphia CLE conference
  • Waivers in Immigration Court proceedings
  • 2007
View all speaking engagements

Attorney endorsements

Received (15)
Given (7)
Endorse Dennis
Unknown Attorney | Jul 18
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Immigration Attorney | Nov 01
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Immigration Attorney | Sep 22
Relationship: Worked together on matter
"Dennis is an excellent lawyer -- thoughtful, thorough, and knowledgeable. Dennis has assisted me on several of my own cases and was extremely helpful. I could tell he cares a great deal about his clients and his craft. I would whole-heartedly recommend Dennis to any client."
Immigration Attorney | Sep 21
Relationship: Fellow lawyer in community
"Dennis is knowledgeable and experienced. Offers well thought out advise. Very pleasant. I endorse him without hesitation."
Immigration Attorney | Sep 21
Relationship: Worked together on matter
"Dennis is a great attorney. He has been a mentor to me and to many immigration lawyers . He's done world-class advocacy on behalf of clients for decades. He recently won an appellate case before the Federal Court of Appeals in Philadelphia, changing the way immigration law itself is applied. And he's a nice guy! Et puis, il parle le francais."
Unknown Attorney | Mar 22
Relationship: Fellow lawyer in community
"I endorse this lawyer. His answers to questions posed are very informative and well thought out."
Immigration Attorney | Mar 03
Relationship: Fellow lawyer in community
"Dennis is an excellent attorney with years of practice in the field. He has been a mentor for many lawyers during his years of practice and has won many cases in his career. He is not afraid to take on the government to protect the rights of his clients. I highly recommend Dennis to anyone looking for an expert in immigration law."
Immigration Attorney | Jan 05
Relationship: Fellow lawyer in community
"Dennis is an outstanding immigration attorney who is extremely knowledgeable, trustworthy, and helpful. You are in great hands with Dennis Mulligan!"
Immigration Attorney | Jul 14
Relationship: Worked together on matter
"During the years that he was in Philadelphia, I have had occasion to work with and witness Dennis Mulligan immigration matters. He is a through, brilliant attorney who cares about his clients and, more importantly, justice."
Immigration Attorney | Apr 30
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Unknown Attorney | Jan 21
Relationship: Fellow lawyer in community
"Top-notch attorney. Highly respected in the legal community."
Unknown Attorney | Oct 10
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Immigration Attorney | Jun 09
Relationship: Co-worker
"Dennis Mulligan is an excellent immigration attorney who is devoted to helping his clients. I had the privilege of having him as a supervisor and mentor in the early stages of my legal career, and I benefitted immensely from his experience and knowledge. I highly recommend him to anyone seeking assistance with an immigration matter."
Immigration Attorney | Jan 18
Relationship: Fellow lawyer in community
"Attorney Mulligan is an exceptional immigration attorney. His experience and achievements in the field are second to none. I have worked together with him on some of the most difficult deportation cases and can assure you he is one of the best immigration advocates in the United States."
Immigration Attorney | Jan 07
Relationship: Worked together on matter
"I endorse Dennis Mulligan wholeheartedly as a consummate and respected professional in the field of immigration law. I have had the pleasure of both working for and working with Mr. Mulligan on immigration matters. He is extremely knowledgeable, thorough and a true expert."
View more endorsements
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