Cambridge Immigration Law, P.C.

Focus and practice areas

Cambridge Immigration Law works only in immigration, which shows in how the practice areas line up. The firm handles marriage-based and family-based green cards, adjustment of status, and consular processing. It also takes citizenship and naturalization matters, along with asylum and deportation defense.

On the employer side, the firm files employment-based petitions. That work covers H-1B, L-1, and O-1 visas, plus PERM labor certification. Keeping family cases and workplace cases under one roof means a client whose situation crosses both can stay with the same office.

In my opinion, the mix is worth noting because immigration itself splits into fields that rarely overlap in daily practice. A firm that files an O-1 petition is not always the same firm you would call for asylum. Here both live in the same set of services.

How the team is built

Ellen Sullivan founded the firm in 2014. Before that it operated as the Law Office of Ellen Sullivan, and she had been practicing immigration law since 2005. She is the supervising attorney and owner. Her earlier work included partnerships at two small firms and roles at non-profit legal organizations, among them the Victim Rights Law Center and Centro Presente.

The attorneys carry defined roles, which tells you something about how a case moves through the office. Sullivan supervises. Associate attorneys handle the substantive filings. An intake attorney and an outreach attorney sit at the front of the process, before and around representation.

The associate attorneys

Maria (Angie) Dorney practices immigration and family law and has more than 16 years in the profession. A native of Peru, she was admitted in Massachusetts in 2018 and to the U.S. District Court for the Commonwealth in 2024. She holds an LLB from the National University of San Marcos and an LLM in American Law from Boston University School of Law.

Sara Trefethen has over seven years in immigration law, with a focus on employment-based cases such as H-1B, L-1, O-1, and PERM. She also assists asylum seekers. She graduated magna cum laude from Florida State University College of Law, clerked for Judge Richard Smoak, and is admitted in Massachusetts and Florida. She belongs to the American Immigration Lawyers Association.

Intake and outreach

Stephany Obradovich joined in January 2026 as intake attorney. She works with clients from the first meeting to build legal strategies and guides prospective clients through their initial steps toward representation. She also runs her own practice in general business matters.

Erin Birmingham Anadu is the firm's outreach attorney and has more than 15 years in immigration law. She began in litigation and has represented clients across the commonwealth, including in federal court and the Executive Office of Immigration Review. She guides individuals and families through immigration matters and lives in Boston with her husband and three children.

What the credentials show

The named attorneys carry admissions and degrees that the firm states plainly. Two are admitted in Massachusetts, and one of them holds a Florida admission as well. Membership in the American Immigration Lawyers Association appears across several team members, which is the field-specific bar association for this kind of practice.

The experience figures the firm reports run long. Sullivan since 2005, Dorney over 16 years, Anadu over 15, Trefethen over seven. As a reviewer, I read that spread as a mix of senior tenure and mid-career depth, rather than a single practitioner with support staff around her.

Paralegals and legal assistants back up the attorneys. That structure matters in immigration work, where filings run on documents, deadlines, and forms that need close handling before an attorney signs off.

Languages and the clients it serves

The firm describes its team as multilingual and says it works with clients from a range of backgrounds. Dorney's route into law, from Peru through a degree at the National University of San Marcos to a Boston University LLM, fits the kind of client base an immigration firm tends to see.

The firm states that its practice is meant to be a safe and affirming space for LGBTQ+ individuals and families. That is a stated commitment about how the office treats clients, and it sits alongside the marriage-based and family immigration work the firm handles.

Where it sits and how to read the listing

The office is in Cambridge, Massachusetts, on Rice Street. The firm keeps profiles on Facebook, Instagram, LinkedIn, and YouTube, so a prospective client can look at how it presents itself before making contact.

Taken together, the record here is built on named attorneys with stated admissions, degrees, and years in practice, plus a defined set of immigration services. In my opinion that is a firmer footing than a listing that leans on adjectives. The facts a reader can check are the credentials of the people who would handle the case, and those are on the page.