Gareth Williams is a serial tech entrepreneur, product strategist and climate-tech advocate who has built a reputation for turning cutting-edge ideas into commercially successful, mission-driven businesses. Today he steers Tailpipe, the Bath-based platform that gives organisations granular, ISO-aligned insight into the carbon cost of their cloud workloads, empowering them to cut emissions without compromising performance. Tailpipe’s holistic “embodied + operational” methodology positions it at the forefront of the fast-growing GreenOps movement.

Gareth cut his product-management teeth in blue-chip telco and data businesses, holding leadership roles at Orange and Experian before joining VC-backed network-analytics scale-up Arieso. There he ran product through to the company’s exit to JDSU, proving his ability to blend technical depth with commercial success.
In 2015 he unleashed his entrepreneurial streak, founding high-performance cloud workload orchestrator YellowDog. Under his leadership, the platform attracted hundreds of customers across the world, raised millions in funding and expanded from a one-person idea to a 30-strong team—growth that saw Gareth named Founder of the Year at The SPARKies and Highly Commended in the Institute of Directors Startup Director awards.

After handing YellowDog’s reins to a successor, Gareth became Managing Director (Product) at no-code pioneer Helastel, before joining global procurement consultancy Efficio as its first Chief Product & Technology Officer. There he lead a global team, modernising the firm’s eFlow SaaS platform, revolutionising the value gleaned from data and embedding sustainable-procurement analytics for Fortune 500 clients.

A Chartered Institute of Marketing alumnus, Gareth is also a non-executive director and mentor to several UK deep-tech scale-ups, sharing hard-won lessons on fundraising, product-market fit and responsible growth. Whether he’s keynoting at Cloud Expo, judging startup competitions, cycling from coast-to-coast or chairing the trustee board of a local scout group (go 63rd Bristol!): technology should solve the world’s hardest problems and do it sustainably.

When he isn’t analysing emissions factors or coaching founders, Gareth can be found exploring the Mendip Hills with his two adventurous children and wife, or fine-tuning a new talk on “Decarbonising Digital”. Audiences leave inspired by his blend of real-world operator stories, actionable frameworks and infectious optimism—hallmarks of a speaker who has proven, time and again, that purpose-led innovation can scale.