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Attorney Track Record

Derek J. Byrne

Byrne Mallory, PLLC·Attorney
#43 of 143Most Experienced#33 of 108Highest Settlement Rate

Track Record

Objective counts from Pinellas County dissolution-of-marriage court records, 2020–2026. Em dashes mean the value is not available in public records.

Pinellas Cases215Dissolutions of record, Pinellas Clerk — all years
Active Last 12 Months7Cases filed in the last year
Years Licensed15Florida Bar
Final Judgments12Cases ending with a signed final judgment
Dismissed0Cases closed without a final judgment
Settlement Rate50.0%See caveat below — not a win rate
With Children10Cases involving custody and timesharing
Expert-Witness Cases6Cases with experts in the docket
HearingsDocketed hearings across cases
Motions / Case2.0Average filings per case
Hillsborough Cases113th Circuit dissolutions of record, all years — secondary circuit

Settlement rate: Share of final judgments with a settlement agreement in the docket. Dismissals are not counted as settlements, and most private settlements never appear in dockets.

Judge Experience

Appearances before each Pinellas County judge, from case assignments in court records

  • Brian Gnage6 cases
  • Steve D. Berlin5 cases
  • Jack Helinger5 cases
  • Rebecca Hamilton3 cases
  • Elizabeth Jack3 cases
  • Benjamin Thomas3 cases
  • Julie L. Sercus2 cases
  • Linda R. Allan1 case

+ 3 more judges with 3 additional appearances

Background

  • ·Family law and real estate attorney at the Law Office of Derek J. Byrne in St. Petersburg, licensed in Florida since 2011 through Stetson University College of Law. Mr. Byrne served as Chairman of the Marital and Family Law Section of the St.

J.D., Stetson University College of Law

  • ·Chairman
  • ·Marital and Family Law Section
  • ·St. Petersburg Bar Association (2018–present)
  • ·St. Petersburg Bar Association Family Law Section — member

35 Pinellas cases 2020-2026. 10 currently open, 3 reopened, 22 closed. Top 3 judges: Brian Gnage (6x), Steve D. Berlin (5x), Jack Helinger (5x).

Head-to-Head

Most frequent opposing counsel in Pinellas dissolution cases, 2020–2026 · Outcome splits are docket counts from public records

Richard A. Zacur2 cases together
1 final judgment · 1 dismissed

2 cases with mixed outcomes — no dominant pattern.

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1 final judgment · 1 dismissed

2 cases with mixed outcomes — no dominant pattern.

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Heather Gurley2 cases together
1 final judgment · 1 dismissed

2 cases with mixed outcomes — no dominant pattern.

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Sean A. Costis2 cases together
2 final judgments · 0 dismissed

2 cases with mixed outcomes — no dominant pattern.

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External Links

Based on 215 public Pinellas County court records, 2020–2026 · Data updated May 8, 2026 · How these rankings work