Charleston, South Carolina • Est. 2021
THE  ZELLNER  GROUP LLC
A Sales & Marketing Company
“You’ll never have to buy
another business card.
As long as you live.”
A one-time purchase less expensive than a good quality box of 100 cards.
Our Mission Get In Touch
38
Years in B2B Sales
Built on relationships, discipline, and follow-through across North & South America.
$87M
Career Sales Generated
Selling from an empty cart — relationship by relationship, from the ground up.
#1
Top Sales Producer
Consistently ranked as the top sales producer.
About The Founder

Dennis A. Zellner —
A lifetime of selling.

Dennis A. Zellner has been a salesman his entire life. It started with lemon and candy stands as a child, shoveling snowy driveways, selling lightbulbs for the Boy Scouts, and running fundraisers for the Jerry Lewis Telethon. That entrepreneurial instinct never left him.

Thirty-eight years later he still approaches every opportunity with the same energy and genuine enthusiasm he had at the very beginning. He treats a $1,000 sale with the same seriousness as a $100,000 sale. He sees “NO” as the beginning of a negotiation — not a rejection.

2021 —
Present
The Zellner Group LLC Founder — Charleston, South Carolina. A Sales & Marketing Company.
2012 —
Present
Thomason Broadband Supply Vice President of Global Sales & Purchasing — Spartanburg, SC.
2000 —
2012
Excess Logistics Inc. President & Founder — broadband equipment, global markets.
1996 —
2000
Comser-Co Inc. VP of Sales & Purchasing — served Comcast, Charter, Cox, Verizon, AT&T.
1991 —
1996
dB-Tronics Inc. Account Executive — #1 sales producer five consecutive years.
Our Mission

Connecting professionals
with solutions that work.

“The Zellner Group exists to bring modern, high-value solutions to the professionals and organizations that need them most — through relationships built on honesty, discipline, and genuine follow-through.”

◆
Relationship-First Selling 38 years of trust built one handshake at a time. Every client, every deal, every follow-up handled with the same discipline.
◆
B2B Sales Excellence Corporate bulk solutions for organizations that need volume, customization, and a partner who understands their industry.
◆
Modern Networking Solutions Bringing the next generation of professional networking tools to the industries that rely on personal connections most.
◆
A Growing Portfolio The Zellner Group is the home for multiple products and services — expanding in the months ahead to serve more markets.
Who We Serve

The markets we know.

Six industries. Decades of relationships. The Zellner Group brings 38 years of inside knowledge to the organizations that matter most.

Telecom & Broadband
Engineers, executives & vendors — Dennis Zellner’s home industry for 38 years. Comcast, Charter, Cox, Verizon, AT&T and beyond.
Primary Market
Insurance Agencies
Thousands of independent agents who need professional, always-current contact solutions that keep pace with their business.
High Volume
Real Estate
Brokers and agents who rebrand constantly — and need networking tools that update instantly without reprinting.
Growing Segment
Financial Services
Wealth advisors, bankers, and financial professionals meeting new clients every single week.
Premium Segment
Promotional Products
Established corporate relationships already investing in branded materials — a natural pipeline for modern solutions.
Existing Pipeline
Healthcare Systems
Physicians, administrators, and department heads who network with vendors and partners every day.
Emerging Segment
What’s Next

The Zellner Group is building something.

New products and services — designed for professionals who demand the best — are launching in 2026.

Details coming soon • Stay tuned

Be the First to Know

Ready to work with a sales partner who knows your industry?

Reach out to Dennis A. Zellner directly.

Phone 854.500.1321
Email Dennis@TheZellnerGroup.com
Location Charleston, South Carolina
Send an Email Call Direct