About Ms. Diana M.
Ms. Diana M. Tennis has run her own practice in Florida since 1994. She opened the Law Office of Diana M. Tennis more than three decades ago and has maintained a steady presence in both state and federal arenas. Her name appears on filings in Florida courts and before the Federal Circuit.
Her professional life is built on the kind of steady practice that comes from years in small-firm and solo settings. She established her office in 1994 and has managed the practical details of running a law practice while representing clients across a range of procedural settings. Over time she has guided matters through trial courts, administrative proceedings and federal appellate filings.
Tennis’s admissions include the Florida bar and the Federal Circuit. That combination means she handles matters that begin in state court and matters that require briefing or argument at the federal appellate level. She has experience preparing appellate filings, responding to administrative records and addressing procedural hurdles that often determine whether a dispute reaches a merits hearing.
Operating a solo practice over decades has also meant managing client relations, deadlines and the business side of law. She has handled case intake, discovery strategy and appellate briefing in-house. That day-to-day work requires both attention to detail and an ability to prioritize complex dockets. Colleagues and clients who refer files to small practices often cite reliability and a steady hand; Tennis’s long-tenured practice reflects the rhythms of that work.
Her courtroom and appellate activity has been shaped by the jurisdictional landscape she inhabits. Florida’s courts present a broad range of civil and administrative matters. The Federal Circuit has a more specialized docket, and appearances there reflect an engagement with patent, government contract and other federal-subject appeals when they arise. Tennis’s practice bridges those spheres when cases demand it.
Outside of litigation tasks, the long-running nature of her firm means she has overseen evolving procedural rules and changes in appellate practice. Keeping pace with those shifts is part of how a solo practitioner maintains steady representation over time. As of 2026 she continues to operate the Law Office of Diana M. Tennis and to represent clients in Florida matters and filings before the Federal Circuit.
