Fay Halkiadaki
Head of Customer Success @ Concirrus
About
I lead strategic customer portfolios where commercial growth and long-term partnership go hand in hand. With 10+ years in Enterprise SaaS, I’ve partnered with large retail and consumer brands to drive retention, expansion and measurable revenue impact. My experience spans high-value, multi-stakeholder environments where value realisation, executive alignment and data-driven decision-making are critical to success. At commercetools, I owned a £13M+ ARR portfolio across 10 strategic enterprise accounts, leading renewal forecasting and expansion strategies that strengthened long-term partnerships. As the first UK-based Customer Success hire, I helped establish the regional CS function while delivering 50+ complex enterprise initiatives. I’m currently exploring senior Customer Success, Strategic Account, or Enterprise Portfolio roles within SaaS where I can: • Own and grow complex enterprise accounts • Drive retention and expansion strategy • Partner at C-suite level • Build scalable customer success frameworks If you’re building a high-performance CS team and need someone who anchors value while driving revenue outcomes, I’d welcome a conversation.
United Kingdom
London
Computer Software
Strategic Account Development, Customer Lifecycle Management, Data-driven Decision Making, Customer Health Scoring , Cross-functional Collaborations, Account Expansion, Enterprise Account Management, Leadership, Coaching, Customer Retention & Growth, Customer Success Strategy, Salesforce.com, Customer Engagement, Business-to-Business (B2B), Data Analysis, Project Management, Decision-Making, Critical Thinking, Problem Solving, Customer Service
Experience

Head of Customer Success
London Area, United Kingdom
▹ Owned strategic enterprise insurance accounts with full accountability for retention and renewal positioning, successfully enhancing stakeholder engagement across key executive levels in the organisation. ▹ Established and scaled the Customer Success operating model to drive adoption and expansion readiness, resulting in improved long-term revenue protection for the company’s major clients. ▹ Strengthened onboarding processes and proactive lifecycle management strategies that significantly reduced risk while improving product consumption across critical accounts in the portfolio. ▹ Implemented customer health scoring alongside structured risk frameworks that enabled early identification of churn exposure, effectively safeguarding annual recurring revenue (ARR). ▹ Introduced centralised usage analytics and insight reporting capabilities that facilitated data-driven executive conversations, allowing for measurable value articulation during client engagements.

Strategic Customer Success Manager
Greater London
▹ Owned a £13M+ ARR portfolio across 10 strategic enterprise accounts with accountability for renewal forecasting, expansion strategy and executive alignment. ▹ Partnered with leading brands including John Lewis Partnership, The Very Group, Burberry, Specsavers, Frasers, Pret A Manger and EE. ▹ Led executive business reviews aligning platform investment to revenue growth, margin optimisation and digital transformation priorities. ▹ Orchestrated cross-functional teams (Sales, Product, Engineering) to support complex migration programmes and protect long-term account value. ▹ Built multi-threaded relationships across C-suite, commercial and technical stakeholders to strengthen renewal positioning and expansion readiness. ▹ Facilitated executive peer forums and supported customers presenting transformation journeys at global industry conferences.

Senior Customer Success Manager
London Area, United Kingdom
▹ First UK-based Customer Success hire, instrumental in establishing and scaling the regional CS function and operating model. ▹ Led the delivery of 50+ complex enterprise e-commerce initiatives from onboarding through post-go-live adoption and long-term value realisation. ▹ Partnered closely with commercial and product teams to align customer objectives with platform capabilities and identify structured growth opportunities. ▹ Built trusted relationships across digital, technology and commercial leadership teams to strengthen adoption and renewal readiness.

Marketing Council (Member)
▹ Contributed as an industry member supporting the MACH Alliance mission around microservices-based, API-first, cloud-native and headless SaaS ▹ Drove engagement by organising and coordinating meet-up events, leveraging my client network to secure attendance and participation

Customer Success Manager, EMEA
Greater London
▹ Owned and expanded a $4M ARR portfolio of complex, multi-brand enterprise accounts across EMEA, including major banking and telecom organisations. ▹ Drove sustained product adoption and long-term partnerships through executive and technical stakeholder alignment. ▹ Delivered a 94% global renewal rate, exceeding FY18 targets by 115%, while partnering with Sales on structured upsell and cross-sell motions. ▹ Acted as Voice of Customer, translating enterprise requirements into roadmap influence and product prioritisation.

Regional Business Development Manager, Emerging Markets
Greater London
▹ Led new business growth across emerging EMEA markets, partnering with regional leadership to identify and close strategic enterprise opportunities. ▹ Exceeded business development targets by 148% through disciplined pipeline generation and targeted account penetration across Eastern Europe, the Middle East and Africa.
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