Experience. Determination. Results Oriented.

The Marks Gray Immigration team practices in the areas of U.S. and global immigration law and compliance, representing domestic and multi-national employers and individuals. 

The team is led by Giselle Carson, a multilingual, award-winning attorney, author, lecturer, 4x Iron Man athlete, 12x marathon runner, and two-time immigrant.

She counsels businesses and individuals in a variety of non-immigrant visas including: H, E, TN, L, O, P and K visas as well as permanent residency status (“green card”) and naturalization. She also counsels organizations in the complexities of EVerify, Form I-9 compliance, and government audits. 

She and her team have worked with a diverse group of organizations and industries, including NFL football teams, NASL soccer teams, leading Fortune 500 companies, small businesses, nonprofits and industry organizations like SHRM (Society for Human Resource Management).

Our immigration team has successfully represented clients from over 60 countries, including:














Costa Rica

Dominican Republic














The Netherlands

New Zealand







Saudi Arabia



South Africa




United Kingdom





The dedicated members of the Marks Gray Immigration Team provide experienced, proactive, and efficient service. Immigration services include, but are not limited to:

Guidance, recruitment coordination, preparation and filing of permanent labor certification application and immigrant visa petitions to adjust status to permanent residence.

Strategic guidance, preparation and filing of temporary, non-immigrant visa petitions on behalf of employers and families including, but not limited to, H-1B professional worker, L-1 intracompany transferee, TN Canadian and Mexican professionals, E-1/E-2 treaty trader/treaty investor, O-1 extraordinary ability person, P-1 athletes and entertainer, and K fiancé spouse.

Counseling, auditing, certification and training on employment authorization, verification (I-9) and E-Verify.

Preparation and advice to employee and family members on procedures for visa processing at consulate or embassy abroad.

  • Advice and guidance on outbound immigration/overseas placement.
  • Guidance on business matters involving organization, contracts, and succession.
  • Legislative updates with analysis of proposed and current developments in the law.
  • Advice, preparation and filing naturalization and citizenship applications.

Testimonials & Reviews

I-140 Petition, Schedule A, and Adjustment of Status/“Green Card” Approval with Priority Date Recapturing for a Filipino Nurse and her Husband

Dearest Attorney Carson,

Thank you so much for everything you have done. Thank you for taking time to call and share the great news. I honor and value you for your genuine concern and for personally having a relationship with your clients. Thank you from the bottom of my heart. More than words can say, I thank you deeply. Thank you most especially for helping not only me and my husband, but also my family back home in the Philippines who depend on me. You don’t know how much that means to them. Thank you for making a difference in our lives. Thank you for giving hope and being an inspiration. May God bless you abundantly and your family!

I-130 Petition, Marriage-Based, Approval and “Green Card” Processing through the National Visa Center with a successful interview at the London Embassy for a U.K. National

Good Morning,

Greetings – I arrived on Thursday in the late evening to a relatively quiet immigration hall. I was advised to line up in the visitor’s line and waited around 5 minutes. I handed my packet and passport over to a very friendly immigration officer. No real questioning beyond the usual. He said congratulations and passed me over to secondary immigration. I waited perhaps another 5 minutes and then a lady came and took my fingerprints and a signature for my green card. Was told to sit back down and wait. 10 Minutes later I was called over to an office. It was explained that I was being issued a 2 year entry and that I will have to file a form 90 days before it expires to have the restrictions removed. And that was it. Really painless! Thank you so much for all your help, we couldn’t have done this without you. I still haven’t really processed the fact I am here!

I-129 O-1A Petition, Extraordinary Ability Status, Approval for Physician/Lead Researcher from Brazil

That’s really great news! I can’t thank you all enough for all your hard work. It’s been an immense pleasure to work with you. I’m looking forward to hearing more from you.

I-140 Petition, Outstanding Professor and Researcher, and Adjustment of Status/“Green Card” Approval for Romanian Physicist

Hi Giselle,

That’s such great news. Now I can plan my summer vacation. I remember the “let’s start the process” email from you that was sent right after the Independence Day Weekend. I ALREADY GOT THE GREEN CARD by mail yesterday (in about ten and a half months) right before the Memorial Day weekend. The green card is the only document I will need from now on (besides my passport) to reenter the U.S. I’ll travel to Romania this summer. I couldn’t help but ‘turning back time’ almost 12 years when a very young, former high-school teacher arrived in the U.S., with only $400 in his pocket, but with hope, dreams, academic skills and potential and determination to succeed: I have to say that I am pleased and very grateful for how things turned out so far. Thank you so very much for your team’s outstanding work and support with this pivotal “green card” matter!

I-130 Petition, Marriage-Based, and Adjustment of Status/”Green Card” approval for Husband, Wife and Step-Child from Colombia. Wife was a student in F-1 Status Prior to Marriage to U.S. Citizen

Dear Giselle and Marks Gray Team,

Our family would like to thank you for all your AMAZING work on our case and the detailed effort you put in every day. We are thrilled to be permanent residents of this wonderful country. Thank you and GRACIAS from the bottom of our hearts!

I-140 Petition Approval for Indian Software Engineer whose Prior I-140 Petition had been Withdrawn by Employer and Beneficiary had little Time left in H-1B Status

Good evening! Thanks so much Giselle! This approval was only possible with your amazing knowledge and strategic approach, together with your paralegal team’s tactical methods. Because of you, the petition was submitted in a perfect and timely manner, and it secured USCIS’ approval. Looking forward to working with you and your team on an H-1B/H-4 3-year extension. Have a nice weekend!

I-130 Petition, Marriage-Based, Approval and “Green Card” Processing through the National Visa Center with a successful interview in Ciudad Juarez for husband who is a Mexican National

Giselle & Team, Thanks You so much for all of your hard work to make our Dreams Come True. We are extremely grateful! Love

I-129 H-1B Petition Approval for Computer Analyst from China followed by successful PERM, I-140 and Adjustment of Status/”Green Card” approval

We will forever be grateful for all you’ve done for us. Thank you Giselle and Thyra

Successful immigration process from TN nonimmigrant status to “green card” through I-130 Petition, Marriage-Based, and Adjustment of Status/”Green Card” for Wife from Canada to U.S. Citizenship

Dear Giselle – Thank you for your personal approach and responsiveness. We were delighted to have worked with you and recommend your services to others. We are also thankful that another lawyer referred us to you.

I-601, Extreme Hardship Waiver, approval for United Kingdom national married to United States Citizen

We are just beyond happy and cannot thank you enough. We never would have won this case without you. I was also shocked at the short timeframe of the approval. We had resigned ourselves to the fact that we may not know anything for another year. We will give you the highest recommendations.

I-129, E-2 Petition, Investor Visa Status, from small business owner from Colombia

The Marks Gray immigration team is excellent. I found them to be knowledgeable, accessible and personally invested in the successful and prompt approval of my case. Because of their work, I am living my dream of running my own business in the U.S. I would definitely recommend them to others.

N-400, Application resulting in successful naturalization of French National

Giselle and Thyra, her immigration specialist, provide excellent service. I was very happy to work with them. I am a proud American citizen because of their help.

Successful immigration process from TN nurse status to “green card” through I-130 Petition, Marriage-Based, and Adjustment of Status/”Green Card” for Wife from Canada to U.S. Citizenship

From the very first visit to Marks Gray, I felt secure and trusting. You were there when I needed someone to take charge and to guide me. Your warm and kind approach compliment your professional and prompt immigration services. Thank you for everything.