Naperville · Greater Chicago
Legal strategy for the life you are building.
Immigration, criminal defense, real estate, estate planning, personal injury, and intellectual property—guided by one attorney with legal, technical, and international experience.
Admissions & Memberships
Licensed in Illinois since 2013 · admitted to federal court and the USPTO Bar
Practice Areas
One firm for the legal moments that shape your future.
Clear service categories, focused guidance, and direct access to the firm when you are ready to talk.
01Immigration & Nationality
Immigration Law
Full-service immigration support for families, professionals, employers, asylum seekers, and noncitizens facing complex immigration issues.
Explore this practice →
02Defense & Courtroom Advocacy
Criminal Defense
Strategic defense for DUI, traffic, assault, domestic battery, drug, theft, expungement, and related criminal matters.
Explore this practice →
03Property & Closings
Real Estate Law
Legal guidance for buyers, sellers, investors, and families involved in residential or commercial real-estate transactions.
Explore this practice →
04Family & Legacy
Estate Planning Law
Planning services designed to protect loved ones, preserve assets, and create clear instructions for the future.
Explore this practice →
05Injury & Recovery
Personal Injury Law
Representation for injured clients seeking compensation after accidents, negligence, and preventable harm.
Explore this practice →
06Innovation & Brand Protection
Patent & Trademark Law
Legal support for inventors, entrepreneurs, and businesses protecting ideas, brands, inventions, and creative assets.
Explore this practice →A Broader Legal Perspective
Your legal issues do not always stay in separate boxes.
A criminal case can affect immigration status. A home purchase can trigger estate-planning decisions. A new business can create immigration and intellectual-property questions. TSEGTS Law Group P.C. looks at the issue in front of you—and the consequences that may come next.
Learn how the firm approaches connected legal needs →Immigration-conscious criminal defense
Family, property, and estate planning
Business, invention, and brand protection
Clear next steps when legal needs overlap
Meet Your Attorney
Legal experience shaped by engineering, business, and an international perspective.
Bayarjargal T. Sereenen is an Illinois attorney and native Mongolian whose practice spans six areas of law. His background combines a Juris Doctor from Southern Illinois University School of Law with electrical-engineering and business experience.
A Clearer Client Experience
Know what happens next.
Simple contact, focused discussion, and a practical path forward.
Reach out
Call or email the firm with the general legal issue.
Identify the issue
Discuss the practice area, urgency, and important deadlines.
Review options
Understand possible paths, risks, documents, and next steps.
Move forward
Proceed with the legal strategy that fits the matter.
Монгол хэл
Mongolian-language immigration support.
Attorney Sereenen is a native Mongolian and has served Mongolian-speaking immigration clients across the United States.
ДэлгэрэнгүйTalk With the Firm
A legal question deserves a clear next step.
Contact TSEGTS Law Group P.C. directly by phone or email.
2813 Blakely Ln, Naperville, IL 60540
Contact the firm
Call or email with the general nature of your legal issue and the firm will follow up on next steps.
Contacting the firm does not create an attorney-client relationship.