Contact Extension

Click on on the names below for contact information.

Main Office Phone: (813) 744-5519

Stephen Gran

County Extension Director

(813) 744-5519 x 54113

Coordinates and supports the staff and services of UF/IFAS Hillsborough County Extension.

Support Staff: Dianna Barnitt, General Manager
(813) 744-5519 x 54112


Lynn Barber

Extension Faculty, Florida-Friendly Landscaping™

(813) 744-5519 x 54105

Water conservation; reducing stormwater runoff and non-point source pollution; Florida-friendly landscape design and maintenance.


B.A., College of St. Catherine


Diana Converse

Extension Faculty, Family Life

(813) 744-5519 x 54140

Parenting, Child Development, Child Care Training, Family/Relationships, Balancing Work and Family, Communication and Grandparenting.


M.S., Human Ecology, Florida State University
B.S., Human Science Education, Bowling Green State University


Susan Haddock

Extension Faculty, Professional Horticulture Services, IPM, and Small Farms

(813) 744-5519 x 54103

Provides educational and diagnostic resources and training to Green Industry professionals regarding urban landscape horticulture, reducing non-point source pollution, integrated pest management (IPM), pesticide licensing and improving industry professionalism. Provides resource based information on Small Farms inquiries.


B.S., Landscape and Nursery Management/Environmental Horticulture, University of Florida, 2005
MBA, Marketing, California State University, 1991
B.S., Biology, Old Dominion University, 1983
Certified Laboratory Assistant, ASCP, Sentara Norfolk General Hospital, 1977


Jackie Hunter

Extension Faculty, Youth, Adult, and 4H Expanded Food & Nutrition Education Program (EFNEP)

(813) 744-5519 x 54121

Provides programs in basic food and nutrition education, food safety, general 4-H Consumer Science and gardening.


M.A., Career and Adult Education, University of South Florida
B.S., Family & Consumer Sciences, Bennett College


Jamila Lepore

Extension Faculty Food, Nutrition and Health

(813) 744-5519

Diet, ingredients and recipe modifications for health; allergies and foods; supplements; nutrition for Head Start and preschool children, elderly, and special needs; nutrition education aids; safe food handling and storage; Nutrition Education Training certification, ServSafe food safety and sanitation certification; newspaper columns and specialty newsletters, health fairs.


Registered Dietitian Nutritionist
ACE Certified Personal Trainer
MS, Food Science and Human Nutrition, University of Florida



Lisa Leslie

Extension Faculty, Personal Finance

(813) 744-5519 x 54143

Personal finance including cash flow management, credit, debt management, and saving & investing for future goals.  Development and adaptation of educational materials to meet needs of different audiences. Outreach includes classes, 1-1 financial mentoring, webinars, and newsletters. Coordinator of Tampa Bay Saves and local coordinator for the Florida Master Money Mentor program.

M.Ed., Instructional Technology, University of South Florida Certified Financial Plannner®
Accredited Financial Counselor®


Rob Northrop

Extension Faculty, Urban, Community, and Traditional Forestry

(813) 744-5519 x 54106

Provides educational programs, technical assistance and planning services to governments, arboricultural and natural resource businesses, communities and homeowners on issues and practices related to urban and community forestry and tree care. Provides technical advice and planning assistance to private and public forest land owners on forest management and restoration, as well as protection and preservation of natural areas.


M.S., Wildlife Ecology, University of Delaware
B.S., Forestry/Wildlife, Virginia Tech


Angela McCain

Media Program Coordinator

(813) 744-5519 x 54129

Provides technology assistance and media production services to extension faculty and staff. Coordinates technology needs for meetings on site and agent visits around the county.


M.S., Library and Information Studies, Florida State Universeity


Chris Oswalt

Extension Faculty, Area Agent for Commercial Citrus for Hillsborough and Polk Counties

(813) 744-5519 x 54131- Hillsborough County
(863) 519-8677 x 108 - Polk County

Commercial citrus production, crop physiology, citrus nutrition, citrus pest and water management.


M.S., Horticultural Science - Fruit Crops, University of Florida, B.S., Citrus Production Management, University of Florida


Nicole Pinson

Home Horticulture

(813) 744-5519 x 54145

Home lawns, landscapes, gardens, Master Gardener Volunteer Program, Junior Master Gardener Program; Environmental Horticulture (water conservation, integrated pest management, backyard wildlife).


M.Ed., Curriculum and Instruction, Secondary Education: Instructional Technology, University of South Florida

B.S., Environmental Science and Policy, University of South Florida


Charles K. Poliseno

Extension Faculty, 4-H Youth Development

(813) 744-5519 x 54132

Programs include Community Clubs, Afterschool Programs, School Enrichment Programs, Ag-Venture, 4-H Tropicana Public Speaking, and the development of other subject matter programs.


B.S., Business Economics, University of South Florida


Francisco Rivera

Extension Faculty, Small Farms & Alternative Enterprises

(813) 744-5519 x 54119

Program includes sustainable agriculture methods, agricultural marketing, rural resource conservation and protection, least toxic pest management, and regulatory requirements for agricultural production. Work may include programs relating to rural/urban interface, intensive small scale agricultural, and small farm livestock/forage production. Additional responsibilities include supporting local farmers' markets and urban farms in addressing food accessibility. Also contributes to the 4-H Youth Development program.


B.S. General Agriculture, University of Puerto Rico at Mayaguez Campus​

M.S. Animal Science concentration in Animal Nutrition, University of Puerto Rico at Mayaguez Campus

M.B.A. Concentration in Accounting, Metropolitan University


Shawn Steed

Extension Faculty, Area Commercial Ornamental Production Agent for Hillsborough & Polk Counties

(813) 744-5519 x 54147

Commercial Ornamental Plant Production – Best Management Practices for Irrigation and fertilization, Integrated Pest Management, Labor and Business Management and Market Development. Youth 4-H and Future Farmers of America Ornamental Horticulture programs.


M.S., Horticulture, University of Florida
B.S., Horticulture, University of Florida


 Alicia Whidden

Extension Faculty, Vegetables & Small Fruit – Commercial Production

(813) 744-5519 x 54134

Commercial Production – Cultural practices, Plant Nutrition, Water and Pest Management, Post Harvest Issues and Marketing.


M.S., Microbiology, University of South Florida
B.S., Botany and Horticulture, Florida Southern College


Brandi Yancy

Extension Faculty, 4-H Youth Development

(813) 744-5519 x 54116

Programs include Community Clubs, Afterschool Programs, School Enrichment Programs, Ag-Venture, 4-H Tropicana Public Speaking, and the development of other subject matter programs.


B.S., Agriculture Education & Communication, University of Florida



Office Hours

Monday - Friday
8:00 am - 5:00pm

Telephone & Fax

Phone: (813) 744-5519
Fax: (813) 744-5776



5339 County Rd 579
Seffner, FL, 33584-3334


Directions to Our Office

Like Us on Facebook!










Important Note
Under Florida law, e-mail addresses are public records. If you do not want your e-mail address released in response to a public-records request, do not send electronic mail to this entity. Instead, contact this office by phone or in writing.