Sullivan & Stanley appoints Andy Haley as CEO to lead next phase of growth
Sullivan & Stanley, the award-winning business change and transformation consultancy, has announced the appointment of Andy Haley as Chief Executive Officer, effective 1 October 2025.
Andy has spent the last 19 years at Accenture, where he built a brand as client-centric leader relentlessly focused on how to drive value and outcomes at the intersection of business and technology. Within that – and what makes him really stand out – is that he’s built his reputation on doing things differently. Andy is outcomes-obsessed, putting client value above all else, and is committed to cutting out the bureaucracy that so often slows progress. His leadership style is about staying close to clients, empowering teams and delivering what clients really care about.
The appointment marks the next stage in Sullivan & Stanley’s evolution as it accelerates its Intelligent Enterprise strategy, strengthens its operational foundations and continues to expand MissionHub.ai – its proprietary AI platform designed to disrupt outdated consulting models.
Pat Lynes, Founder of Sullivan & Stanley, said:
“From the moment I met Andy, it was clear he understands what makes S&S different and how we can bring even greater value to our clients. Our Intelligent Enterprise proposition is already helping organisations rethink how they deliver transformation, and with Andy’s leadership we can scale that impact even further.
Clients today want partners who combine insight with execution, who bring energy and expertise, and who are bold enough to challenge traditional models. That’s exactly where Andy excels. This is about building on what’s already been achieved and taking the business into the defining decade for our industry. Together, we’ll continue building trusted relationships, expanding the value we deliver through MissionHub.ai, and helping our clients achieve faster, smarter and more sustainable outcomes.”
Andy Haley, CEO, said:
“What excites me most about joining S&S is the opportunity to help our clients succeed in a world that is only getting more complex. The firm has built trusted relationships through its senior client communities, and its track record for delivering real value is second to none. Behind that is a talented team of energetic professionals who put client success at the heart of everything they do.
As we look ahead, our AI-enabled capabilities, powered by the growing strength of MissionHub.ai, will give clients the intelligence they need to better optimise their organisations and deliver on what matters most to them. I’m excited to be part of this journey and to work alongside our clients in creating the next generation of enterprise performance.”
The leadership transition reflects Sullivan & Stanley’s ongoing investment in client value, talent and capability. Founder, Pat Lynes, will continue to play an active role in shaping market strategy, client relationships and innovation, ensuring continuity in vision while empowering Andy to drive the next phase of delivery and growth.