Houston founder shares how he's using tech to make digital media more effective and equitable

houston innovators podcast episode 173

This month, Mark Walker is celebrating his company's one year anniversary of going public — only the ninth Black-founded business to accomplish this feat on a U.S. stock exchange. Photo courtesy

After working in both sides of the advertising world, Mark Walker thought he could reimagine a platform that would be more efficient and equitable.

Walker co-founded his company, Direct Digital Holdings, an adtech platform, after serving in several roles — from an early hire at Houston digital media startup Questia to business development director at NRG Energy and COO of EBONY Media. He shares on the Houston Innovators Platform how he took this experience in tech, advertising, and media to create his company's platform.

"NRG Energy gave me a top-down view of the value chain, and Ebony gave me a bottoms-up view of the value chain of how media is purchased," Walker says on the show. "At Direct Digital Holdings, we help companies buy and sell media — and we leverage technology to do it. It's really the culmination of both of those experiences."

With over 30,000 publishers on its platform, Direct Digital makes it easier for its core customers — middle market companies looking to buy into the digital media ecosystem — to tap into these opportunities without the tech know-how they might otherwise need. Walker explains that at EBONY, he saw how small to midsize publications — especially the multicultural ones — were being left out on the ad selling side of the equation. The Direct Digital platform bridges the gap on each end.

Founded in 2018 in partnership with Keith Smith, who went through similar professional experiences, Direct Digital went public exactly one year ago after growing the company through strategic M&A activity. Walker says the decision to IPO made the most sense for his company — though it wasn't an easy process. Direct Digital is only the ninth company founded by a Black entrepreneur to go public on a US stock exchange.

"If you think the process is hard — it actually is," Walker says on the journey to IPO. "We were a privately held company, and we knew we had a good growth trajectory and we looked a couple different options. We decided to go public in a very traditional way."

Walker explains there were some risks involved, but the co-founders ultimately decided to shy away from adding in investors who might not have the same ideas for the company's future.

Direct Digital has been a Houston company from the star — despite the city not being home to a booming adtech ecosystem. Instead, Houston — with its collection of Fortune 500 companies and rich diversity — has allowed the business to stand out.

"If you look at and reflect on how our company has been built — from our board of directors to our leadership and management team — we're a majority minority organization all the way across the board," Walker says. "Diversity is very important to us. It's the lifeblood of our business — especially because we're serving publishers in those communities in big way. And moreso, we think you get the best product, thoughts, and ideas from a diverse workforce, and Houston fits right into that mold for us."

Walker shares more about his company's future, advice on IPO, and what all he's watching in adtech — from AI to streaming — on the podcast. Listen to the interview below — or wherever you stream your podcasts — and subscribe for weekly episodes.


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10+ can't-miss Houston business and innovation events for August

where to be

School is back in session this month, and a busy slate of Houston business and innovation events follows. This month brings demo days, loads of networking opportunities and a major health symposium. Here’s what not to miss and how to register. Please note: this article may be updated to add more events.

Aug. 4 — CEOs: Build With AI, Exit With a Premium

Join Blue People for this engaging presentation by David Lopez, founder of Summa, at the latest installment of Tech + Tequila Talk. Lopez will discuss AI moves that can multiply a company's value.

This event is Tuesday, Aug. 4, from 5-7 p.m. at the Ion. Register here.

Aug. 4 — SEIP Demo Day

The Rice Center for Engineering Leadership will showcase the groundbreaking projects developed by its Summer Engineering Innovation Program at the 2026 Demo Day. Attendees can meet the SEIP participants and partners and hear the teams' final presentations.

This event is Tuesday, Aug. 4, from 6-8 p.m. at the Ion. Register here.

Aug. 5 — Summer Venture Studio Preview Day

The Liu Idea Lab for Innovation and Entrepreneurship (Lilie) will present its inaugural Summer Venture Studio Preview Day this month. Hear from the student founders selected for Lilie's summer cohort, which features teams ranging from the healthcare and artificial intelligence to advanced manufacturing sectors.

This event is Wednesday, Aug. 5, from 4-6 p.m. at the Ion. Register here.

Aug. 11 — Mercury Fund Day at the Ion: How Legacy Software Giants Are Going AI-First

Don’t miss the latest installment of Mercury Fund Day at the Ion, previously known as Software Day. The recurring monthly event features office hours (by application), a keynote and networking opportunities. This month's topic will feature a working conversation with Senior Director of Growth at Twilio Mustafa Ali, Senior Director of Consumer Product at WhatsApp Zafir Khan, and Founder and CEO of utilITise Salim Gheewalla.

This event is Tuesday, Aug. 11, from 3:30-7 p.m. at the Ion. Register here.

Aug. 13 — Pints and Prototypes

TMC Innovation Lab will host its Pints & Prototypes networking event this month. Minneapolis-based Medtronic will support this month's event and has invited guest speakers to share their journey in the medtech scene.

This event is Thursday, Aug. 13, from 4-5:30 p.m. at TMC Innovation Factory. Find more information here.

Aug. 14 — Houston Methodist Cancer Symposium

The 14th Annual Houston Methodist Cancer Symposium will bring together Houston Methodist scientists and physicians from a broad spectrum of fields to discuss everything from innovative translational science to clinical updates. The symposium aims to provide education focused on improving patient care, research collaboration and leading medicine.

This event is Friday, Aug. 14, from 7:30 a.m.-4:45 p.m. at Houston Methodist Research Institute. Find more information and register here.

Aug. 14 — Hands-On Workshop: Build Your Own Reusable AI System

Impact Hub Houston and Social Media Breakfast of Houston will host this hands-on workshop on using Smart Card to create a repeatable process users can hand off to AI. Attendees should bring a laptop, an AI tool, and a task that AI could help with. The workshop will focus on working with ChatGPT, Claude or Gemini.

This event is Friday, Aug. 14, from 8:30-10:30 a.m. at the Ion. Register here.

Aug. 17-21 — Foundations of Cancer Therapeutics Crash Course

The Gulf Coast Consortia will host a virtual course focused on the commercialization aspects of moving cancer therapeutics toward the market. Presenters represent The University of Texas Medical Branch Galveston, the Greater Houston Partnership, TMC Innovation, the University of Houston, Texas Southern University and other major institutions.

This event begins Monday, Aug. 17, at 10 a.m. Register here.

Aug. 20 — Pickle Lab’s Two-Year Anniversary Celebration

Enjoy an evening of open-play pickleball, beats by a live DJ, giveaways and more at the second anniversary celebration of Pickle Lab in the Ion District. Enjoy a free beverage from Second Draught and food for purchase from the Crunchy’s for the Munchies food truck.

This event takes place Thursday, Aug. 20, from 6-9 p.m. at Pickle Lab at the Ion. Register here.

Aug. 20 — SBA Lender Matchmaking Event

Business owners can meet with multiple lenders in scheduled, one-on-one 15-minute sessions during this speed-dating style SBA event. SBA Houston District Office representatives will also be onsite to provide free business advising.

This event takes place Thursday, Aug. 20, from 8:30 a.m.–noon at SBDC Sam Houston State University – The Woodlands Center. Register here.

Aug. 27 — BiteLabs Digital Health and Innovation Summit

TMC Innovation and BiteLabs will host the Digital Health and Innovation Summit, which aims to connect clinicians, founders and investors. The event will include an AI in biotech panel, a healthcare AI ethics panel, a hiring in digital health panel, and pitches from BiteLabs USA HealthTech, AI, and Innovation Fellowship.

This event takes place Thursday, Aug. 27, from 10 a.m.–5 p.m. at TMC Innovation Factory. Register here.

Houston nonprofit wins Meta grant to study AI glasses for disabilities

Helping Houston

A grant from Meta will help Easter Seals Greater Houston determine whether wearable AI smart glasses improve accessibility for those with disabilities. The local nonprofit is one organization that received a share of $2 million that Meta allocated in late July.

"Meta is proud to select recipients, including the Easter Seals Greater Houston, based on demonstrated impact, scalability, and relevance to areas where hands-free technology can make the biggest difference," Meta executive Beth Murray said in a request for comment. "It was exciting to receive nearly 500 applications from organizations across the country, and now the real innovation begins here in Houston with the Easter Seals project to understand how different local communities can benefit from AI glasses."

Meta launched its AI Glasses Impact Grant program in January with the goal of delivering nearly $2 million in funds to organizations across the country to see how their Meta AI Glasses could improve people's lives. It selected over 30 recipients from more than 500 applicants.

Easter Seals is using the grant to help pay for its BridgingApps Program, "a community-centered pilot studying how three distinct populations — people with low vision, people with intellectual and developmental disabilities, and those with cognitive aging – can benefit from AI glasses," Meta says. Easter Seals is part of one of the oldest networks in America for disabilities, delivering disability support, veteran training, and other services. The Greater Houston branch was established in 1947.

Meta AI Glasses integrate AI personal assistance with wearable tech for a hands-free connective experience. While many people use their built-in cameras and social media access to create content, the Impact Grant promotes how the technology might assist people with disabilities as well as innovate in industrial and scientific fields.

Data storage and recall could aid people with memory loss, while interpretative AI facial recognition software may let neurodivergent and developmentally delayed people recognize social cues. The pilot program at Easter Seals will explore some of these possibilities.

Two other Texas organizations received grants. The University of North Texas will also explore disability assistance through Meta AI Glasses, in a school environment rather than in the general public space. Austin software company Embarcadero Technologies will use the glasses to build a remote training platform that can simultaneously mentor five junior workers at once.

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This article originally appeared on CultureMap.com.

Houston startup lands $10M to power up electrician staffing platform

money moves

Houston-based Buildforce, which provides a tech-enabled staff platform geared toward electricians and electrical contractors, has raised a $10 million Series A round led by Houston’s Saepio Capital.

Other investors in the round include Blue Heron Capital, Revolution’s Rise of the Rest Seed Fund, S3 Ventures and Chicago Ventures.

Buildforce says the funding will help fuel its national expansion and further development of its technology.

The startup, founded in 2019, connects electricians with electrical contractors for commercial and industrial construction projects. Buildforce’s mobile app helps electricians find and carry out work, and a web app helps electrical contractors find and manage electricians.

“This financing is a major milestone in furthering our mission to help people dedicated to a career in the construction trades lead more secure and fulfilling lives,” co-founder and CEO Moody Heard said in a news release.

Buildforce focuses solely on the electrical trade within the construction sector.

Nick Graziano, principal at Blue Heron, says the shortage of electricians is intensifying as demand for electricians accelerates, driven by data center construction, infrastructure development and energy transition initiatives.

The U.S. Bureau of Labor Statistics estimates the U.S. will need to hire about 80,000 new electricians per year through 2032 to catch up with demand. According to the National Electrical Contractors Association, the U.S. is grappling with a current shortage of 50,000 electricians.

A 2026 economic report from asset manager BlackRock says the electrical trade is expected to be the single fastest-growing employment category in the U.S. labor market over the next 10 years.

“Buildforce is capitalizing on a clear opportunity in America’s generational infrastructure buildout. We believe their mission to use technology to improve lives in the construction space will allow them to make a positive long-term impact on a large and important labor market,” added Jaan Bains, managing partner at Saepio Capital.

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