About
GreeNexus
Where it all started
A Vision to Build Better, Greener Projects
GreeNexus began when founder Amanda Tullos saw a need for stronger, more practical sustainability support in the building industry. With her background as a licensed architect and her experience leading some of the region’s most advanced green building projects, she created a firm focused on real, measurable impact.
Her early work in sustainability, LEED, policy development, and community leadership set the foundation for GreeNexus’ approach.
Mission
Our mission is to remove barriers so teams can achieve sustainable, high-performing buildings.
Vision
Our vision is to lead the shift toward buildings that regenerate ecosystems and improve human well-being.
Culture
Our team is inspired by altruistic outcomes and leads with a collaborative and inclusive spirit
Proud Affiliations & Memberships
U.S. Green Building Council Member
Since 2012
Austin Energy Green Building Participant
Since 2019
Green Building Initiative Member
Since 2019
Enterprise Green Communities
Since 2020
International Living Future Institute
Since 2021
JUST Certification
Since 2021
ENERGY STAR PARTNER
Since 2021
Certified Woman-Owned Small Business
SBA EIN 45-2202151, DUNS 9684198801
NCTRCA Certification Number WFWB73070N0920
City of Houston Certification Number 18-10-11831
As certified by the Small Business Association, North Central Texas Regional Certification agency, and the City of Houston Office of Business Opportunity, respectively.
Your Sustainability Partners
Amanda Tullos
CEO
FAIA, LFA, LEED AP, BD+C & ID+C, SITES AP, SEED AP,
ENV SP, FITWEL Ambassador, Certified Permaculture Designer
Carolina Martinez Gallegos
Project Director, Senior Sustainability Consultant
BArch, MSc, LEED AP BD+C & O+M, LEED Faculty, LEED Performance Pro, FITWEL Ambassador, ActiveScore AP, USGBC WiG: Rising Star – Latin America
Elizabeth Bautista
Technical Director, Senior Sustainability Consultant
BArch, M.Ed., LEED AP BD+C, WELL AP, Green Rater, ActiveScore AP
Milena Romero
Senior Sustainability Consultant
BArch, MBA, LEED AP BD+C & ID+C, WELL AP, SITES AP
Nohemi Mena Hernandez
Technical Consultant, Senior Sustainability Consultant
Bachelor Energy Engineering, Commissioning Authority, LEED AP BD+C, FITWEL
Join Us in Building a Sustainable Future
We’re here to help you bring sustainability to life on your next project. Reach out, and let’s explore how we can work together.