About Rosemary Messineo
Rosemary Messineo Kostopoulos has practiced law in Illinois since 2004. She is based in DuPage County and works from the Kostopoulos Law Group, where she has maintained a steady presence in the local legal community. Her career spans more than two decades and centers on serving clients across the state.
Kostopoulos began her professional legal career in 2004 at the Kostopoulos Law Group. Over the years she has handled matters that have kept her closely engaged with the courts and administrative offices in DuPage County. Colleagues describe her approach as methodical; she tends to build cases step by step and relies on careful preparation. She has remained in private practice rather than moving into public office or corporate counsel roles.
She maintains memberships in professional legal associations and participates in community legal networks in the Chicago suburbs. Those ties have helped her stay connected to developments in Illinois law and to the practical concerns of local judges and administrative decision-makers. She attends continuing legal education programs and other professional gatherings to keep current on procedural and substantive changes affecting her clients.
Kostopoulos’s day-to-day work involves direct client counseling, negotiating with opposing parties, and presenting matters in court when litigation is necessary. She handles filings and hearings in the DuPage County courthouse and other venues throughout Illinois. Her practice involves routine drafting of legal documents and managing case timelines, often coordinating with experts and other counsel when a case requires outside input.
Clients and other lawyers who have worked with Kostopoulos note that she is steady in her handling of matters and attentive to procedural detail. That temperament can be helpful in jurisdictions where local practice and fast-moving dockets require careful docket management and timely filings. Her office maintains regular hours in DuPage County to meet with clients and to prepare for hearings and deadlines.
Today Rosemary Messineo Kostopoulos continues to practice from the Kostopoulos Law Group, operating primarily out of a DuPage County office and representing clients throughout Illinois. She currently practices law in Illinois from her DuPage County office, representing clients across the state.
