

Claire Clark is a senior technology and delivery leader with over 20 years of experience supporting organisations through periods of change, complexity and delivery pressure.
She works with boards, executives and delivery teams to rescue struggling initiatives, stabilise execution and build sustainable ways of working that enable organisations to scale with confidence.
Claire is available for interim and fractional roles including CTO, VP, CPO and Agile Delivery Transformation Lead, working across product, engineering and software delivery in complex and regulated environments. Her approach combines hands-on leadership, pragmatic Agile transformation and strong governance - focused on outcomes rather than theory.
Her work is underpinned by ISO-aligned governance and security practices, including ISO 27001 and ISO 9001, as well as emerging ISO 42001 AI governance. This ensures delivery improvements are not only effective, but resilient, compliant and trusted by customers, investors and regulators.
Claire is a Chartered Engineer (CEng) and has supported organisations ranging from startups and scale-ups to PE-backed and enterprise environments across sectors including cybersecurity, logistics, telecommunications, manufacturing, emergency services and transportation.
She is often brought in when:
• Delivery confidence has dropped
• Programmes or transformations are under pressure
• Capability increase and culture change is needed
• Teams need realignment or stabilisation
• Boards or investors need independent assurance
Her focus is consistent: assess reality, recover what’s broken, and deliver meaningful results.
Advisory, Fractional & Interim Leadership
Senior technology and delivery experience, when you need it.
For founders and leadership teams navigating growth, delivery challenges or change. From independent advice and challenge through to hands-on fractional, interim or interim leadership.
I've lived many of the challenges you're facing
I've spent my career inside technology organisations - building and scaling teams, leading software delivery, developing leaders, managing growth, improving engineering and delivery practices and turning business strategy into execution.
That experience now allows me to work alongside investors, founders and technology leaders who are navigating many of the same challenges.
Sometimes you just need an experienced perspective. Sometimes you need help making change happen. And sometimes you need someone experienced to step in and help lead.
That's why Sienso offers flexible access to my experience through Advisory, Fractional and Interim leadership.



