From Web 2.0 to Web 4.0: Over Two Decades of Helping Businesses Convert Online
I started building and optimising websites in 2005, the year after I graduated with a Corporate Communications degree. Back then, “SEO” wasn’t a job title — it was something you figured out because you wanted the sites you built to actually be found. Twenty years later, it’s still what gets me out of bed in the morning.
I’m Sean Mullins, founder of SEO Strategy Ltd, a specialist SEO consultancy based in Southampton. I work with a small number of clients at any one time, which means every engagement gets my direct attention — not a junior account manager, not an intern, not a chatbot. Me. The person who’s been doing this for two decades, who understands your industry, and who is genuinely invested in your business doing well.
I’m only as successful as my last client. That’s not a line — it’s how I’ve built this business. Fewer clients, higher quality, deeper relationships. My clients treat me as an extension of their marketing team, and that means a lot.
The Work That Proves It
The best way to understand what I do is to look at who I’ve done it for and how long they’ve stayed.
Olliers Solicitors — I’ve been working with Olliers since March 2015. They’re a leading criminal defence firm in Manchester and one of the UK’s top motoring law practices. Over almost a decade together, I’ve helped take their digital presence to the next level through SEO strategy, content development, digital PR, YouTube video content and structured data that feeds both Google and AI systems. The relationship speaks for itself — ten years and counting.
Coviant Software — Since summer 2021, I’ve worked with the team behind Diplomat MFT, an enterprise managed file transfer platform. I built interactive ROI calculators that generated over 200 enterprise leads and contributed to a multi-million-pound sales pipeline. I flew out to San Antonio, Texas in February 2026 to work with the team in person. That’s the kind of client relationship I build — transatlantic, long-term, and deeply embedded in the business.
Pro2col — The UK’s leading managed file transfer consultancy, also since summer 2021. Deep, technical SEO for the healthcare IT and enterprise software space, where you need to understand HIPAA compliance, HL7 FHIR interoperability, and Oracle Health integrations to write content that actually ranks and converts.
Motoring Defence Solicitors — London-based specialist motoring law firm. We’ve been working together since May 2018, building visibility in one of the most competitive legal niches in the country.
Become Coaching & Training — An ICF-accredited training provider I’ve worked with since 2018. They came to me needing to grow their online presence and convert more enquiries. Sean at Become said I “truly transformed their business” — those are the outcomes I work towards.
Vivid Arts — I’ve been working with Vivid Arts since 2010. Sixteen years. I rebuilt their website in January 2026 and they’re still a client I’m proud to support.
Future Employment — One of my earliest clients. I designed their logo and built their website back in 2008. I still do ad hoc work with director Regan Steward — most recently in 2025, helping the business niche into Rec2Rec recruitment and make headway in the rankings. Eighteen years on from that first project.
Azure Outdoor Living — An award-winning outdoor living company I’ve been working with since 2023, building their organic visibility in a competitive home and garden market.
International Pectin Producers Association — A Belgium-based international trade association who found me by searching “SEO Strategy Agency”. I won the contract against two other agencies who tendered. That’s what happens when your own SEO actually works.
EFL in the Community — I rebuilt their site in 2015. Working with a charity of that scale — the community arm of the English Football League — taught me how to handle complex stakeholder requirements and diverse audiences.
Unity Insurance Services — Another charity client, this time around the lockdown period. I worked with them for two to three years on their digital presence during one of the most challenging trading periods any business has faced.
From Dog Walkers to International Trade Associations
One of the things I’m most proud of is the range. My first proper local SEO project was The Dog Walker Portsmouth — I designed the logo, created the flyers, built the website and baked SEO into the foundation of the build. That site still ranks number one organically for “Dog Walker Portsmouth” today. A website I built in 2009, still outranking everything else seventeen years later. That doesn’t happen by accident.
I’ve worked with plumbers, electricians, taxi companies, IT support firms, architectural practices, coaching providers, law firms, healthcare IT companies, SaaS businesses, charities, and international industry bodies. The common thread is always the same: understanding the business first, then building a search strategy that actually works for that specific context.
That range matters because it means I’ve seen what works across wildly different markets, budgets and competitive landscapes. The principles of good SEO are universal, but the application is always specific.
How I Work
SEO Strategy Ltd is a premium consultancy, not a high-volume agency. I deliberately keep my client roster small so I can go deep rather than wide. My day rates reflect the seniority and direct access you get — you’re not paying for a team structure, you’re paying for twenty years of accumulated expertise applied directly to your business.
My background as both a developer and an SEO strategist is unusual and valuable. Most SEO consultants produce recommendations that then need to be translated through a developer. I diagnose issues, formulate strategy and implement solutions myself. No communication gaps, no Chinese whispers, no three-week wait for a developer ticket to be picked up.
I’m also a strong advocate for AI-assisted development — what I call “vibe coding”. I use tools like Claude to accelerate development while maintaining rigorous human oversight on strategy, quality and creative direction. The theme powering this website, the AI Knowledge Agent answering questions on it, and the interactive tools I build for clients — they’re all products of this approach. It lets me deliver custom solutions at a speed and cost that would be impossible with traditional development, while maintaining the quality standards that enterprise clients require.
Why AI and LLM Optimisation Matters Now
This is where the industry is heading, and it’s where I’ve positioned my expertise. In 2026, millions of people ask ChatGPT, Perplexity, Google AI Overviews and other AI tools for recommendations instead of — or alongside — traditional Google searches. If your business isn’t being cited by these systems, you’re invisible to a rapidly growing segment of your potential customers.
My LLM Optimisation service covers AI Overview Optimisation (AIO), Answer Engine Optimisation (AEO) and Generative Engine Optimisation (GEO). These aren’t buzzwords I’ve bolted onto my service list — they’re built on the same foundations I’ve been working with for twenty years: technical SEO, structured data, entity authority, and content that demonstrates genuine expertise.
The difference is that now, getting this right means your business gets cited as a source by AI, not just listed in a search result.
The Short Version
Twenty years. From local dog walkers to international trade associations. Client relationships that last a decade or more. A consultancy model built on depth, not volume. Technical implementation and strategic thinking from the same person. And a genuine, demonstrable track record of getting businesses found online and converting that visibility into revenue.
If that sounds like the right fit, let’s have a conversation.