Management Team

In one word, how can we sum up what motivates our management team?


A passion for knowledge.

A passion for excellence.

A passion to produce the most attention-grabbing, discussion-provoking, and highest quality signs in Houston and around the country.

Every member of our leadership team is dedicated to producing unique signage that enhances your organization’s brand and effectively communicates your message.

Our Team

Gregg Hollenberg, President & CEO

Gregg Hollenberg has extensive executive management experience in a variety of industries. Gregg joined National Signs in Houston as Chief Operating Officer in 2008, was named President in 2010 and added the role of CEO in 2012. Prior to joining National Signs, Gregg held P&L responsibilities for several growing organizations including two multi-billion dollar divisions of a Fortune 500 retail electricity provider and manufacturer of specialty concrete products.

Gregg is actively involved in local community and industry organizations, including the President of the Texas Sign Association, Board of Directors of the Greater Houston Sign Association, Board of Directors of Hermann Park Conservancy.  He is a former member of the Board of Directors of the Houston Better Business Bureau. Gregg holds a Bachelor of Arts in Economics and Masters of Business Administration from Duke University.

SenLy Fox, Vice President

SenLy joined National Signs in 2013 as Vice President.  She oversees all of the company’s direct sales, marketing, design and project coordination activities. She has over 15 years of sales leadership experience in the telecommunications industry and has won numerous national awards at every level for establishing, leading and growing high-performance sales organizations.

In addition to her professional role, SenLy is the Advisory Board Chair for Pink Door, a charity for women cancer survivors and previously served as their Executive Vice President and Board of Directors as well as Vice President on the Alumni Board of Directors of the University of Houston Bauer College of Business. SenLy earned a Bachelor of Business Administration in Marketing and Psychology from the University of Houston.

Amanda Tanner, Controller

Amanda joined National Signs in 2017 as Controller.  She oversees all of the company’s accounting, finance and human resource activities. She has over 10 years of accounting leadership experience in the oil and gas, marketing and workforce solutions industries.

Amanda is fluent in Portuguese and a volunteer leader with United Way. Amanda earned her Bachelor of Science in Accounting from Kean University.