This case study outlines the deployment of Sparkle's Quantum Safe over Internet (QSI) service, which provides secure, high-performance IPsec VPN connections using post-quantum symmetric encryption. The document describes the challenges faced by a Sparkle customer who needed to ensure long-term confidentiality for sensitive data processed in AWS, particularly against emerging quantum threats. It details how Sparkle's QSI utilizes Arqit’s symmetric key agreement to deliver quantum-resistant keys integrated into the IPsec VPN tunnel, ensuring data in transit remains protected. The case study highlights the seamless integration of the solution into existing infrastructure without requiring hardware upgrades. Additionally, it presents the results of the deployment, including the achievement of secure VPN connectivity with no performance impact and compliance with evolving crypto-security standards. The document emphasizes the importance of quantum-safe solutions for enterprises dealing with sensitive data in cloud environments.