John South
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John South Email & Phone Number

Tandem Principal | Board Member | Investor at Tandem Theory
Location: Dallas-Fort Worth Metroplex, United States, United States 14 work roles 1 school
1 work email found @tandemtheory.com LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 86%

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Work email j****@tandemtheory.com
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Current company
Role
Tandem Principal | Board Member | Investor
Location
Dallas-Fort Worth Metroplex, United States, United States
Company size

Who is John South? Overview

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Quick answer

John South is listed as Tandem Principal | Board Member | Investor at Tandem Theory, a company with 93 employees, based in Dallas-Fort Worth Metroplex, United States, United States. AeroLeads shows a work email signal at tandemtheory.com and a matched LinkedIn profile for John South.

John South previously worked as Tandem Principal | Board Member | Investor at Gpo and Principal | Board Member | Investor at Tandem Theory. John South holds Bachelor'S Degree, Management Science, Finance, Information Systems from Oklahoma State University.

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{first}.{last}@tandemtheory.com
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Profile bio

About John South

• MarTech pioneer with over 30 years of industry experience • Founded initial Internet start-up in 1995; merged into a public co. in 1998 (NASDAQ: RRRR) • Material M&A experience (played a key role in eight acquisitions and five sales) • Provided start-up and bridge funding for Vidmaker prior to their acquisition by Google • Currently an investor, board advisor, and mentor to four start-up/early stage companies • Co-founded one of the Internet's first FinTech companies in 2003 • Practical experience with AI and machine learning • Awarded four separate patents by the USPTO

Current workplace

John South's current company

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Tandem Theory
Tandem Theory
Tandem Principal | Board Member | Investor
Texas, United States
Employees
93
AeroLeads page
14 roles

John South work experience

A career timeline built from the work history available for this profile.

Tandem Principal | Board Member | Investor

Gpo

Dallas-Fort Worth Metroplex

Principal | Board Member | Investor

Current

Dallas, TX, US

Tandem is a marketing and advertising agency based in Dallas, Texas. The company provides leading brands with a broad range of both online and offline marketing services driven by data science. Tandem recently celebrated its 10th anniversary and has a reputation for marketing that drives incremental revenue and growth. At its core, Tandem is a.

Dec 2018 - Present

Board Advisor | Growth Agent

Current
Gpo

Austin, Texas, US

GPO is a search technology and consulting company that focuses on connecting brands with local consumers by driving clicks, calls, and retail visits. The company offers a mix of SaaS-based content publishing solutions paired with services such as SEO, business listing management, and content development. GPO has a presence in Austin, Dallas, and Nashville.

Apr 2015 - Present

Managing Partner | Principal

Current

Venture451 provides private capital and growth services to early-stage companies. Current and past investments include Vidmaker (acquired by Google in 2014), Oben (oben.com), and InboundGeo (inboundgeo.com). While the focus is primarily on advertising, marketing, and technology, the company also has investments in food services and fashion.

Aug 2012 - Present

Co-Founder | Investor

Current
Horizon Digital Finance Holdings, Inc.

South co-founded Horizon Digital Finance (HDF) in 2003 as one of the industry's first FinTech companies. HDF empowers consumers by helping them arrange for financing in advance of shopping for a vehicle. The primary website is myAutoloan.com which has been in operation for over 15 years. It’s the Nation's longest operating marketplace for.

Mar 2003 - Present

Board Member | Investor

Dallas, Texas, US

Inboundgeo was a martech company that provided offline retargeting of online visitors. The value proposition was simple. Brands spend an enormous amount of money attracting web visitors. Inboundgeo helped identify household mailing addresses and monetize the last mile by following the pixel into the home with highly targeted direct mail. Changes in privacy.

Oct 2018 - Dec 2023

Chief Digital Officer | Principal

St. Louis, MO, US

In December of 2010, St. Louis-based NSI Marketing Services and Chicago-based Frontenac acquired the assets of RAZOR in a private equity transaction. The combined company was rebranded as Ansira with offices in St. Louis, Dallas, Chicago, Atlanta, and Los Angeles.

Dec 2010 - Aug 2012

Chief Digital Officer & Evp | Principal

St. Louis, MO, US

The formation of Razor Digital in 2006 marked the fourth consecutive iteration and the 10-year anniversary of the original Internet marketing entity, FS3 Interactive. Through a series of mergers, acquisitions, and spin-offs, South operated as FS3 Interactive (1995-1998), the Dallas office of Rare Medium (1998-2001), Andara Digital (2001-2005), and RAZOR.

Jan 2006 - Dec 2010

President & Ceo | Founder

Initially, Andara Digital was an Internet services company (founded by South) that specialized in digital strategy, Web site development, search marketing, and Internet application development. The firm helped clients use interactive solutions to drive incremental revenue and lower customer support costs. Key clients included: JCPenney, Pizza Hut, Kinkos.

Nov 2001 - Dec 2005

Evp | Shareholder

In November of 1998, South signed an LOI to merge FS3 with New York-based Rare Medium (NASDAQ: RRRR). Rare was one of the first publicly traded Internet development companies. In June of 1999, South played a key role in helping secure a $75 million investment from New York-based Apollo Management. South held positions as Chief Of Staff to the COO, Global.

Nov 1998 - Mar 2001

President & Ceo | Co-Founder

With the decommissioning of ARPANET in 1990 and NFSNET (National Science Foundation Network) in 1995, all restrictions on the commercial use of the Internet were effectively lifted. In January of 1995, South founded FS3 Interactive as a professional services company advancing the commercial use of the Internet by developing websites and Internet.

Jan 1995 - Oct 1998

Director | Employee

South joined FCM Investments in 1990 and was tasked with developing a next generation system for trading and portfolio management. That work effort led to an investment from Richard Fisher (past president of the Federal Reserve Bank of Dallas) and the formation of Fisher Information Systems. In 1993 South began transitioning the operations of FIS away from.

Jan 1990 - Dec 1994

Data Center Division: Area Manager | Employee

West Hartford, US

After college, South joined Ross Perot’s EDS and held various positions within the Credit Union Services group (CUNADATA). In 1988, South was promoted to Regional Manager for the Data Center Division and helped facilitate the consolidation and migration of data centers within a five-state region into EDS' larger and more strategic Information Processing.

Jun 1985 - Jan 1990
Team & coworkers

Colleagues at Tandem Theory

Other employees you can reach at tandemtheory.com. View company contacts for 93 employees →

1 education record

John South education

  • Oklahoma State University
    Oklahoma State University
    Information Systems
FAQ

Frequently asked questions about John South

Quick answers generated from the profile data available on this page.

What company does John South work for?

John South works for Tandem Theory.

What is John South's role at Tandem Theory?

John South is listed as Tandem Principal | Board Member | Investor at Tandem Theory.

What is John South's email address?

AeroLeads has found 1 work email signal at @tandemtheory.com for John South at Tandem Theory.

Where is John South based?

John South is based in Dallas-Fort Worth Metroplex, United States, United States while working with Tandem Theory.

What companies has John South worked for?

John South has worked for Tandem Theory, Gpo, Venture451, Horizon Digital Finance Holdings, Inc., and Inboundgeo.

Who are John South's colleagues at Tandem Theory?

John South's colleagues at Tandem Theory include Maddie Cuda, Danielle Snyder, Connor Quinn, Ashley Williams, and Angela Baker.

How can I contact John South?

You can use AeroLeads to view verified contact signals for John South at Tandem Theory, including work email, phone, and LinkedIn data when available.

What schools did John South attend?

John South holds Bachelor'S Degree, Management Science, Finance, Information Systems from Oklahoma State University.

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