Salary: £99,000 - 121,000 per year Requirements: Expert-level understanding of MSIX architecture, including staging vs registration, container isolation, VFS, private registry hives, user-context behaviour, and package signing. Strong knowledge of MSIX limitations, particularly around services, drivers, global COM, system-level integrations, and constraints of per-user registration. Hands-on experience with MSIX Packaging Tool and third-party tooling (e.g. TMEditX), conversion workflows, package editing, manifest troubleshooting, PSF (Package Support Framework), and fixups. Experience deploying MSIX in enterprise environments using AppVentix and/or App Attach. Ability to advise on MSIX suitability assessments, edge-case remediation, and when not to choose MSIX and retain current App-V 5.x packages. Confidence working with MSIX in non-persistent VDI. Deep, battle-tested experience across traditional and modern packaging technologies: App-V 5.x, MSI, and PSADT. Proven experience supporting application delivery in large, complex enterprises with strict governance. Understanding of app delivery to Citrix non-persistent VDI, image management, profile volatility, and session behaviour. Ability to troubleshoot across the entire application stack: OS integrations, dependencies, runtimes, COM, registry, file system, permissions, and virtualisation layers. Strong investigative mindset to deep-dive into logs, manifests, event traces, ProcMon captures, and debug difficult packaging failures. Responsibilities: Build high-quality, supportable MSIX packages and deliver them into production. Work across a large-scale, complex estate dominated by non-persistent Citrix VDI. Engage with developers, infrastructure teams, security, and support to resolve complex application delivery issues. Produce high-quality technical documentation, handover notes, and packaging standards. Conduct MSIX suitability assessments and provide edge-case remediation. Troubleshoot and rebuild complex packages from scratch as needed. Author Custom Actions and handle major/minor upgrades with complex logic branching. Participate in packaging and deployment via MECM (SCCM) and Intune application model experiences. Technologies: Citrix Support Security PowerShell More: We are a leading technology solutions provider located in Warwickshire, dedicated to delivering innovative application packaging and deployment strategies. Our team thrives on tackling complex challenges in a fast-paced environment while ensuring that our clients receive the highest quality support. We offer a hybrid working model, with a requirement of 2 to 3 days onsite per week. This role is designed for a specialist who is passionate about MSIX and can contribute to our enterprise-level solutions. last updated 8 week of 2026