Elevating Visionaries. Supporting Legacy.
We're here to bring Houston's best to the forefront with a focus on transformative projects, progressive initiatives, and clean energy.
A Strategic Partnership with A Singular Voice.
SULLTRAIN is a premium communications consultancy formed through the longstanding partnership of Mark Sullivan and Jay Fields, operating as a dedicated initiative within The Fields Companies. Built on trust, performance, and deep-rooted relationships, SULLTRAIN brings executive-level strategy to corporate branding, media positioning, and reputation development.
Milestones in Meaningful Work
SULLTRAIN is the result of decades of relationships, reputation, and results. What began as a solo practice grew into something larger, a strategic collaboration rooted in trust and shared vision. This timeline highlights the defining moments that shaped SULLTRAIN’s trajectory, from its founding to its role today as a communications partner for industry leaders and cultural institutions alike.
The Early Years
Mark Sullivan launched his first communications firm, On the Mark, with a vision to offer clients more than publicity—he delivered precision storytelling, long-term brand development, and media relationships built on trust. His early success earned him a reputation as one of Houston’s most connected and respected voices in public relations, serving influential clients across business, philanthropy, and culture.
A New Chapter
In 2024, Sullivan joined forces with Jay Fields and The Fields Companies to establish SULLTRAIN. That same year, SULLTRAIN stepped onto the cultural stage as a sponsor of Houston’s iconic Art Car Ball, marking a commitment to storytelling not just in business, but in the arts.
Present Day
Now as a cornerstone of The Fields Companies, SULLTRAIN works closely with industry leaders across infrastructure, logistics, hospitality, and finance—shaping narratives that position brands for growth, visibility, and long-term impact.
LEGACY CLIENTS
Over the years, Mark Sullivan has partnered with some of Houston’s most visionary businesses and cultural institutions, guiding their narratives, amplifying their presence, and shaping the way they’re remembered. These logos represent more than clients. They're long-standing collaborations built on trust, strategy, and shared ambition.
Appear
to be
every-
where.
Appear to be
everywhere.
Houston art car parade
Scenes from Sulltrain's 2025 VIPit Art Car Suite — An Afternoon of Art, Style, and Creative Celebration
For Those Who Move Differently
SULLTRAIN is built for those who lead with intention—brands, founders, and organizations ready to invest in the power of perception. Explore our latest insights, announcements, and cultural contributions in The Latest, or connect directly to see what’s possible.
