NAISMA’s Staff members provide a dynamic range of skills, experience and expertise toward invasive species management programs across North America.

Christie Trifone Millhouse

Executive Director

Christie oversees the management and financial stability of the organization, identifies new and creative ways to fulfill NAISMA’s mission, ensures that activities align with the Board of Directors’ goals and organization strategic plan, and supports the organization culture.


Elizabeth Brown

Government Relations Director
Elizabeth leads NAISMA’s science policy and advocacy efforts, as well as overseeing certification and professional development programs. She serves as the key liaison between NAISMA and many allied groups and is the lead coordinator for National Invasive Species Awareness Week (NISAW).

John Stabinger

Digital Project and User Support Director

John supports and develops NAISMA’s web properties, online learning systems and digital marketing.

Lindsey Cathcart

Education and Prevention Manager

Lindsey manages our education and prevention programs, working to provide opportunities for recreationists to prevent the spread of invasive species and empower them to incorporate land stewardship in their favorite outdoor activities. Lindsey has experience in invasion research, environmental education and community science, and most recently coordinated volunteer-powered invasive plant management in Washington D.C.’s Rock Creek Park.

Michelle Huntley

Membership and Marketing Manager

Michelle manages NAISMA’s marketing and membership strategies. She is dedicated to intentional communications that support invasive species professionals. She has a wide array of experience in creating marketing campaigns, managing projects, fundraising, and coaching. Michelle enjoys working with a team of like-minded professionals on a mission for the good of North America’s environment. She lives in SC with her husband and pup.

Tina Page

NAISMA’s Online Shop Manager

Tina manages NAISMA’s online store.  She is committed to supporting our community and NAISMA’s mission by providing products that help to restore and preserve our natural landscapes. With a background in merchandising, marketing, and product development she is excited to expand the store’s inventory to best support the needs of our community members. Tina lives in Hawaii with her husband and two young kiddos on their organic farm

NAISMA is an Equal Opportunity Employer

NAISMA does not discriminate in employment on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, membership in an employee organization, retaliation, parental status, military service, or other non-merit factor.