DANIEL J. KOLEOS
Dan is AV® Preeminent ™ Rated, Peer Review Rated by Martindale-Hubbell. He is a native of West Palm Beach, Florida and has been litigating in Federal and Florida state courts for over 28 years.
Dan served thirteen years on active duty in the United States Marine Corps from 1978 to 1991. He was one of ten Marine Corps officers specially selected in 1982 to attend law school, and he graduated from Stetson University College of Law in 1985, under a fully funded Federal program. Dan is a former Judge Advocate (1985-1991) and Special Assistant United States Attorney for the Eastern District of Virginia (1985-1988) and District of South Carolina (1988-1991). While in the Marine Corps, Dan made two overseas deployments and was awarded three Navy Commendation Medals and a Navy Achievement Medal for meritorious service.
Dan began his private practice in 1991 and is a former partner of Luks, Koleos & Santaniello, P.A., Hinshaw & Culbertson and Rumberger, Kirk & Caldwell, P.A. He has been a member of The Florida Bar since 1985 and he is also a member of the bars of the United States Court of Appeals, Eleventh Circuit, United States Court of Military Appeals, and the United States District Court for the Northern, Middle and Southern Districts of Florida. Dan is also a member of the American Bar Association Tort and Insurance Law Section, Defense Research Institute and Florida Defense Lawyers Association.
Dan’s practice areas range from first party life, health and disability litigation, professional liability (medical, nursing home, legal, insurance broker/agent, real estate broker/agent, accountant, engineering, developer and general contractor), premises liability and products liability to general insurance and coverage litigation. He also handles high exposure, catastrophic personal injury and wrongful death cases, as well as complex Federal litigation, such as ERISA, RICO, securities and medical device litigation under the Food, Drug and Cosmetic Act.
Dan resides in Plantation, Florida with his wife, Debi.
ALAN S. ROSENBERG
Alan is AV® Preeminent ™ Rated, Peer Review Rated by Martindale-Hubbell. He is a 1993 graduate of the University of Miami, School of Law (cum laude) and a 1990 graduate of the George Washington University, asin Washington, D.C.
Alan has been a member of The Florida Bar since 1993 and is also admitted to practice law in Washington, D.C. He is a member of the U.S. Supreme Court Bar and is also a member of the bars of the United States Court of Appeals, Eleventh Circuit, and the United States District Court for the Northern, Middle and Southern Districts of Florida.
Additionally, Alan is a member of the Dade and Broward County Bar Associations, Defense Research Institute, Florida Defense Lawyers Association and the American Bar Association.
Alan served as a member and Associate Editor on the University of Miami, Inter-American Law Review and ranked as a finalist in the Moot Court Appellate Competition. He made Dean’s List on numerous occasions and received the Dean’s Honor Scholarship while at the University of Miami, School of Law. While attending GWU, Alan worked at the Department of Justice/Office of the Inspector General and served on investigation teams in New York and Washington, D.C.
He is a former member of Hinshaw & Culbertson and a former partner of Luks, Koleos & Santaniello, P.A.
Alan’s practice areas focus on business and commercial litigation; contract and business counsel; insurance coverage litigation; insurance defense litigation, first party litigation; Life, Health, Disability and ERISA litigation; professional liability, commercial auto and premises liability defense. He specializes in high exposure cases in both Federal and State court and is active in arbitration proceedings.
GREGORY P. McMahon
Greg is AV® Preeminent ™ Rated, Peer Review Rated by Martindale-Hubbell. He is the equity partner in charge of Koleos Rosenberg McMahon’s law office in Orlando, Florida.
He has substantial experience with first and third party insurance disputes (property damage, coverage disputes, personal injury, wrongful death, commercial and personal automobile, and premises liability); general insurance (agent/broker liability, breach of fiduciary duty and fraud); bad faith and punitive damages; commercial litigation (contracts, non-compete agreements, and commercial eviction); professional liability (legal, insurance agent/broker and engineer); and ERISA life and disability litigation. Greg frequently lectures nationally and in Florida on topics involving property and casualty claims, bad faith as well as life and disability coverage.
Greg has been a member of The Florida Bar since 1998 and is also licensed to practice in all three of the U.S. District Courts in Florida, the U.S. Court of Appeals for the Eleventh Circuit, and is a member of the U.S. Supreme Court. His professional memberships include the American Bar Association; The Florida Bar (where he served on the Student Education and Admissions Committee to the Florida Bar from 1999-2001); the Orange County Bar Association (Citizens Disputes Mediation Program 2006-2017); the Defense Research Institute; and the Florida Defense Lawyers Association.
Prior to becoming an attorney, Greg earned his B.S. degree in Criminology from the Florida State University. Thereafter, he worked as a Registered Representative for Merrill Lynch & Company. He then attended law school at the Shepard Broad Law Center where he served as editor-in-chief of the Nova Law Review, and earned his Juris Doctor degree, cum laude.
Greg lives in Orlando with his wife, Angela and their 3 children.
LEONARD D. BLUMENTHAL
Leonard handles a diverse civil case load, applying his broad experience as a litigator in state and federal court. His multiple areas of practice include professional liability, product liability, premises liability, negligent security, construction defect liability, Chapter 400 residents’ rights claims; and numerous types of first party insurance actions. He performs appellate work for the firm; as well as class action/complex litigation.
Leonard received his Bachelor of Arts degree in English Literature from Brooklyn College – City University of New York in 1992. He received his Juris Doctor Degree with honors (cum laude) from Fordham University School of Law in 1999, where he was a member of the highly respected Federal Civil Litigation Clinic.
Leonard is licensed in the State of Florida (1999) and State of Nevada (2007) and admitted to practice before all federal jurisdictions within those states.
ANGELA M. McMAHON
Angela is an associate attorney in the firm's Orlando, Florida office.
She has substantial experience with insurance law, business law, family law, consumer debt issues and commercial leases. Angela has been a member of The Florida Bar since 2008 and is also licensed to practice in the Southern and Middle U.S. District Courts in Florida. She is a member of the Young Lawyers section of the Florida Bar, and was formerly a Staff Attorney to the judiciary for the Ninth Judicial Circuit Court, before entering private practice.
Once in private practice, the Supreme Court of Florida Young Lawyers Division of the Florida Bar and the Florida Pro Bono Coordinators Association awarded Angela for providing exceptional services to underprivileged members in the Orlando community. Most recently, in 2015, she was invited to join the George C. Young American Inn of Court, by a member of the judiciary, whose members are from all areas of federal and state practice, and include some of the best and most respected lawyers in the state.
Prior to becoming an attorney, Angela completed her undergraduate studies at Austin Peay State University, on a debate team scholarship, receiving a Bachelor’s of Business Administration degree in Marketing. She then worked for an international Fortune 500 company prior to attending law school at Western Michigan University, earning several book awards, including Florida Civil and Criminal Procedure, where she completed her Juris Doctor, with a concentration in litigation. During this time, Mrs. McMahon was the only law student accepted for a federal clerkship with the U.S. Department of Defense, in Washington D.C., where she worked for the Deputy Assistant Secretary of the Army, in the Equal Employment and Civil Rights Office, and prepared final agency decisions.
Angela lives with her husband Greg and three children in Orlando.
KIMBERLY K. DIONISIO
Kim Dionisio is an associate in the firm’s Tampa office and is a true Florida native, born and raised in South Florida.
After earning a B.A. in history from the University of Virginia, Kim had the privilege of serving as a legislative aide for the U.S. House of Representatives for three years. She went on to attend the University of Florida, Levin College of Law where she pursed a Certificate in Environmental and Land Use Law and excelled in courtroom advocacy with Environmental Moot Court.
Kim has been fortunate to put her skills to work in a variety of legal settings, including four years as a judicial law clerk for the Honorable K. Rodney May with the federal bankruptcy court in the Middle District of Florida. Thereafter, she spent three years as a staff attorney within the Office of General Counsel for the Southwest Florida Water Management District.
In 2016, Kim was recruited to join the family business and practice law under her father, Dan Koleos and his long time partners and associates. Kim has concentrated her practice in defending insured individuals and small businesses in various types of civil cases including negligence actions, premises liability, and professional liability. She also maintains a case load involving insurance coverage litigation, bankruptcy matters and elder law affairs.
Away from the office, Kim enjoys coffee runs to Buddy Brew, spending time with her husband and two little boys, and all things Tampa. Her family enjoys being out on the water in any capacity.