Oisin McGrath

About

I install the commercial governance and renewal systems required to transform Customer Success into a predictable revenue engine for B2B SaaS and Martech companies (£5M–£30M ARR). Pedigree & Impact: Leveraging experience with global leaders like Taboola and Optimizely, I have managed cumulative portfolios of £40M+ and strategic books of £18M. My framework-first approach has delivered 300% YoY expansion and 100% renewal retention across Tier 1 enterprise accounts (including Spotify, Disney, and WPP/Publicis). Strategic Value: I partner with Founders and CROs to install: Renewal Governance & Forecasting Discipline: Improving executive-level revenue visibility. Expansion Architecture: Structured playbooks to scale Net Revenue Retention (NRR). Stakeholder Multi-threading: Navigating complex enterprise and agency holding company ecosystems. I provide the strategic leadership of a full-time Head of CS without the overhead, focusing on high-impact infrastructure builds and team coaching.

Experience

• Founder · Letaro11-01-2025

  Leading the design and launch of Letaro, a London-focused SaaS platform that helps short-let hosts gain structured visibility over the 90-day usage rule. Driving the full product lifecycle: brand strategy, UX/UI design, technical implementation using no-code tools, payment integration, and early user acquisition. Validating demand and refining positioning through direct community outreach and early tester programmes.

• Senior Customer Success Manager · Sliide11-01-2023 – 08-01-2025

  Led strategic partnerships with global MNO, MVNO, and OEM stakeholders to maximize revenue and engagement through tailored mobile monetization solutions. Served as the primary lead for high-value accounts, driving measurable growth in ARR and reducing churn by aligning Sliide’s core technologies with partner-specific KPIs. By facilitating cross-functional collaboration between Product and Engineering, translated complex partner requirements into scalable product enhancements, ensuring a seamless on-device content experience from the first impression.

• Account Director · Bright Network01-01-2023 – 12-01-2023

  Bright Network is the innovative SaaS platform that helps enterprise companies reach, engage, and recruit high-caliber students from all backgrounds. This sales role is focused on account growth for Bright Network by managing and developing a portfolio of new & existing clients. Transition new clients to my portfolio and build strong relationships with key stakeholders. Developing and delivering comprehensive, results-focused campaigns that align to client objectives. Identify and pursue new business & up-sell opportunities. Being the first point of contact for clients and resolving issues promptly.

• Enterprise, Senior Customer Success Manager · Welcome, an Optimizely Company12-01-2021 – 01-01-2023

  Focused on driving revenue growth through strategic partnerships. Acted as a trusted advisor, guiding partners on how to leverage Welcome's software and services to achieve their specific business objectives. This collaborative approach culminated in securing high-value, multi-market global deals. Proactively identified upsell and new business opportunities within existing partnerships. Advocated for clients' needs across all departments and communicated tangible ROI achieved from Welcome's solutions. Gathered valuable product feedback from clients and communicated it to product, engineering, and R&D teams.

• Enterprise, Customer Success Manager · Welcome, an Optimizely Company08-01-2020 – 12-01-2021

  As an Enterprise Customer Success Manager, likely contributed to customer satisfaction and retention by managing client relationships, ensuring successful adoption of Welcome's solutions, and identifying opportunities for upselling and cross-selling.

Education

• Munster Technological UniversityBachelor of Business and Marketing, Marketing
• Douglas Community SchoolLeaving Certificate, Business/Commerce, General

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