John Garner
Head of Continuous Improvement @Three Uk
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WORK HISTORY
Head of Continuous Improvement @Three Uk
EDUCATION
Cambridge Judge Business School
Digital Disruption: Digital Transformation Strategies, Business Strategy
The University of Waikato
Executive MBA, Business Administration and Management
Harvard Business School
Executive Education 1 Week Intensive Course, Changing the Game: Negotiation & Competitive Decision Making
ABOUT JOHN GARNER
I am a force multiplier helping Functional Directors and Technology CXO\'s turn around complex program delivery performance and restore C-Suite confidence.I specialise in stepping into high-pressure environments where:1. Organisation silos and misalignment are costing time, money and trust2. Program delivery has stalled3. Partners are underperforming and relationships are broken or strained4. Aligning team focus, capabilities and maturity to support business outcomes - bridging the technology/business language barrierWorking with the C-Suite, I bridge the gap between strategy and on-the-ground reality - diagnosing root causes, holding delivery Partners to account, re-building relationships, and building cross-functional momentum and collaboration to deliver at pace. With extensive international experience in Telecoms, I bring the credibility, structure, and clarity that senior stakeholders need to unblock delivery performance and business success across the value chain.The detail:My track record spans senior Telco roles across New Zealand, Japan, Europe, and the UK, including Vodafone Group. I sit at the intersection of Technology (IT/Networks/Ops), Procurement in-life Partner management, Finance (CAPEX/Opex/Treasury/AP) and the wider business enterprise value chain.I\'ve driven over £100m in Partner proposition value, negotiated complex commercial contracts, and built high-performing functions from the ground up. At scale, I\'ve led governance, PMO, and programme recovery — achieving 93% employee engagement in a transition environment, cut contract approval times by 80% across £250m+ spend, enabling predictable contract renewals, reduced business risk, and accurate Treasury cashflow forecasting across the value chain. I also resolved over £5m in disputed Partner invoices, restoring 95% compliance to payment SLAs. I bring a practical, commercial lens to every problem: cutting through noise, translating technology into business language, and keeping delivery on track when it matters most.
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