Need help with something at the lab? See the list of Staff Responsibilities. Staff affiliated with the Apalachicola Bay System Initiative are denoted with the acronym ABSI. Organizational charts for the laboratory and for ABSI are found here.


Joel Trexler, Ph.D.

FSUCML Director



Durene Gilbert

Administrative Assistant

Maddie Mahood

ABSI/FSUCML Outreach Assistant

Maranda Marxsen

Business Manager

Travis Mohrman

Assistant Director

Gina Wells

ABSI Program Manager


Facilities & Marine Operations

Lance Crum

Small Boat Technician



Mark Daniels

Seawater Systems Specialist

Matt Edwards

Lead, Marine Ops & R/V Captain

Dan Overlin


Mike Repchak

Director, Research Tech Ops

Research Operations

Dean Grubbs, Ph.D.

Assoc. Director of Research

Kevin Engelbert

Breithaupt Lab Research Tech

Shannon Kirk

ABSI Hatchery Technician


Chris Matechik, MSc

ABSI Research Assistant

Eve Moore

Brooke Lab Research Technician

Cullen Morris, MS, JD

FSUCML Lead Research Assist.

Chris Peters, MSc

Diving Safety Officer

Joe Rocco

ABSI Hatchery Manager

Barry Walton, MSc

FSUCML Research Technician


Lab Tours -- Thursdays and Fridays 11 - 4 pm.   850-697-4120 CANCELLED UNTIL FURTHER NOTICE DUE TO COVID

Our docent program has grown immensely over the past year and has become one of FSUCML's most unique and fun volunteer opportunities. Our docents are volunteer staff members that serve as public ambassadors for FSUCML and help conduct tours and special programs for visiting guests.  To learn more about being an FSUCML docent, or to sign-up, click here.  You may also contact Durene Gilbert at or call (850) 697-4095.

P. Scott Hausmann

William (Doc) Hernnkind

Linda Leimbach

Angelo Lembo

Craig Overstreet

Nancy Paul

Denise Williams

Rhonda Work

FSU Security

John Matthews

Security Guard

Robin Sexton

Security Guard

Last Updated: Monday, March 15, 2021 at 9:31 AM