Senior Staff

Jack Mulvena

President and CEO

In 2013, Jack Mulvena joined Naples Zoo at Caribbean Gardens as President and CEO. Mulvena served for 20 years as the Executive Director of the Rhode Island Zoological Society and Roger Williams Park Zoo in Providence, Rhode Island. Jack is a national conservation leader with a special focus on education and motivating young people to get involved in wildlife conservation. Jack is also a leader in the effort to persuade the United States Congress to pass legislation to address critical environmental challenges by strengthening and expanding environmental education in America’s classrooms. Most importantly, Jack knows from experience how to sustain the highest standards of animal care, offer compelling experiences to zoo guests, and create a professional working environment that attracts the top talent in the zoo profession.


Liz Harmon

Director of Animal Programs

Liz has been in the zoo field since 1984. She started her career as a keeper and has been in the curator role since 1991. During these years, Liz has worked in a variety of facilities accredited by the Association of Zoos and Aquariums (AZA) from small zoos to large institutions with thousands of animals under her care. Preferring the connectedness of the smaller zoo atmosphere, she is pleased to be at Naples Zoo. Liz has been involved in AZA animal management programs including serving as a studbook keeper and in management positions on numerous Species Survival Programs and Taxon Advisory Groups. She has served as an accreditation inspector since 2006 and is a member of the AZA Animal Welfare Committee.


Douglas Rickenbach

Chief Operating Officer

With nearly three decades of experience in the themed attraction industry including both Cedar Fair and Six Flags parks, Doug brings a depth of professional experiences to insure guest satisfaction and safety including operating an Incident Command structure.  As the Chief Operating Officer, Doug also has oversight of visitor service divisions including the Primate Expedition Cruise, Giraffe Feeding Station, online and in-person ticketing and membership sales, and the Group Sales Department featuring on-site events from weddings to corporate events. Doug also coordinated bringing in third-party expertise for retail, food services, and camel rides. As a member of both the Association of Zoos and Aquariums and the International Association of Amusement Parks and Attractions, Doug uses a wealth of resources to continually grow and enhance guest experiences.


Marci Seamples, IOM, CFRE

Director of Development

A Naples native, Seamples is the Director of Development at the Naples Zoo at Caribbean Gardens. She has worked for the past two decades in the nonprofit sector and holds a BA from the University of Rochester, a MAM from the H. John Heinz III School of Public Policy and Management at Carnegie Mellon University, the IOM designation from the US Chamber Foundation Institute of Organization Management and has earned CFRE certification.  Seamples currently serves on the board of the Greater Naples Area Planned Giving Council and the Bonita Springs Area Chamber of Commerce.  She is a member of the Association of Fundraising Professionals, Collier-Lee Chapter, an Ambassador for the Greater Naples Chamber of Commerce, and an undergraduate admissions interviewer for the University of Rochester’s College of Arts and Sciences. She is a 2011 graduate of Leadership Collier.


Danielle L. Green

Director of Gardens and Grounds

Danielle is responsible for the development and management of the Zoo’s public and exhibit landscape and botanical education programs. A native of Virginia Beach, VA, Danielle has been working with plants professionally for over 20 years, to include 11 years as Curator of Horticulture and Environmental Initiatives at Zoo Atlanta.  Clients of her work have ranged from corporate office parks to residential communities to lowland gorillas, feisty giraffe, and Malayan tigers.  Seeking the eternal recipe for creating a destination landscape to transport each observer to their favorite oasis is the goal of each workday.  Danielle holds a BS degree in Biology / Horticulture from Christopher Newport University and is the president of the Association of Zoological Horticulture.


Courtney Jolly

Director of Public Relations & Marketing

As a Naples native and seventh generation Floridian, Courtney knows the Naples market very well and is very involved in the community. She enjoys volunteering with many nonprofit organizations in the area, including The Salvation Army, Friends of Foster Children of Southwest Florida, Naples Equestrian Challenge, The Ronald McDonald House, 4-H Youth Leadership and Swamp Buggy Incorporated. Ms. Jolly attended Florida Gulf Coast University, where she obtained her degree in Marketing. Her career began in bank marketing as a Marketing Coordinator and Marketing Specialist, planning events, coordinating sponsorships, maintaining marketing and sponsorship budgets, coordinating fundraising events, collateral design, design editing, cultivating media relationships and creating/executing marketing strategies in the South Florida Market. She is responsible for all marketing and public relations for the Naples Zoo.


Cory Merrill

Director of Finance

Cory joined the Naples Zoo in 2013 and serves as the Director of Finance.  He leads the financial operations of the organization, including responsibility over accounting, accounts payable, and payroll as well as grants and fundraising administration.  Previously, Cory was in the role of Accounting Manager with the Community Foundation of Collier County. He began his professional career in public accounting with Clifton Larson Allen LLP, where he served as a Senior Accountant and provided services to public and private organizations in the practice areas of assurance, accounting, and taxation. Cory graduated from Florida Gulf Coast University, where he received both a Bachelor’s degree in Accounting and a Master’s degree in Accounting and Taxation. Additionally, he is a licensed CPA in the state of Florida. He lives in Naples with his wife.



Stacy Graison

Director of Education

As head of a new formal education department, Stacy is creating a diverse array of programs such as summer camp, outreach programs, and on-site educational activities. A native of Venice, Florida, Stacy has been educating in zoos and aquariums since the late 1990s. She is a graduate of the University of Florida and has a master’s in Ecological Teaching and Learning from Lesley University. She supported the development of the Environmental Education Certification program through the University of Georgia and the Environmental Education Alliance of Georgia, and currently serves on the AZA’s Conservation Education Committee. She is a certified educator through the Advanced Training in Environmental Education and a certified guide through the National Association for Interpretation. She is passionate about conserving wildlife and wild places, play behavior, and stewardship and thrives on sharing that.


Tim L. Tetzlaff

Director of Conservation

Tim coordinates Naples Zoo’s portfolio of field conservation efforts from Florida panthers to Malagasy lemurs. He serves on the boards of two international conservation organizations, participates in regional groups, and serves on the Field Conservation Committee of the Association of Zoos and Aquariums. Tim also researches, develops, and designs the interpretation graphics in the Zoo. Tim loves the outdoors and is delighted to introduce others to its wild wonders when he hosts safaris for the Zoo to Africa. As the son of Zoo Founders Jungle Larry® and Safari Jane®, Tim has built a life on communicating the wonders of the animal kingdom. 


Brian Settle

Director of Human Resources

Majoring in Human Resources and Business Management, Brian graduated from Eastern Illinois University and has served as the head of human resources/chief human resources officer with four healthcare systems as well as being a Human Resources Consultant.Brian is a member of the Society for Human Resources Management and a past chapter president of it as well as a past chapter president of the American Society of Healthcare Human Resources Administration. He served on the Board of Directors for the Naples Area Chamber of Commerce. Brian has facilitated discussion groups at large meetings, presented at national and local conferences, and continues to consult and lead presentations on various Human Resources issues.