About Bayarjargal Bayar
Bayarjargal Bayar Sereenen earned his Juris Doctor from Southern Illinois University Carbondale in 2013. He completed his legal education at a time when many young lawyers were entering both traditional courtroom practice and specialized federal fora. The degree set the stage for a career that crosses technical and immigration-related lines of law.
He began practicing in 2013 at TSEGTS LAW GROUP P.C., joining the firm as an attorney. Early years at the firm saw him take on matters that required federal admissions and federal filings. Over time he added specific credentials that broadened the range of matters he can handle.
Sereenen is admitted to the Illinois bar and is authorized to appear before the Federal Northern District Court of Illinois. He is also registered with the U.S. Patent and Trademark Office, having passed the Patent Bar. Those admissions enable him to work on patent prosecution and to represent clients in federal litigation when cases reach the district court level. At the same time, his professional affiliations signal involvement in immigration practice. He has been a member of the American Immigration Lawyers Association since 2017 and maintains membership in the American Bar Association.
His practice blends paperwork and court work. Preparing patent applications and advising on patent-related procedural issues requires close attention to technical detail and deadlines. Handling immigration matters calls for familiarity with statutory and regulatory traps, filing protocols, and administrative processes. In other words, his day-to-day work spans both administrative filings and courtroom appearances when disputes require litigation.
Colleagues and clients have encountered him at different stages of legal processes: drafting applications, preparing evidence, filing pleadings in federal court, and appearing for hearings. He has worked on cases that travel from agency proceedings to federal dockets. That range reflects the combination of his USPTO admission, federal trial court permission, and his membership in immigration law circles.
Sereenen continues to practice at TSEGTS LAW GROUP P.C. He keeps active memberships in national legal organizations and maintains the federal and patent admissions that shape his caseload. His current practice involves patent matters, immigration filings, and related federal filings.
