Application Decommissioning Consultant - Outside IR35 - Hybrid/Glasgow

Gigged.AI; Glasgow; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Gigged AI is seeking a senior Application Decommissioning Consultant to lead discovery for a multi-stream decommissioning programme in a hybrid Glasgow setup. The role requires deep experience across application, infrastructure, network, database and security workstreams.

Responsibilities include building a Dependency Register, defining runbooks, roadmaps, and governance anchors while engaging SMEs and driving timely decisions.

Qualifications

• 15+ years in application/technology consulting, rationalisation, transformation or ITSM.
• Delivery on application decommissioning or retirement programmes.
• Hands-on experience with dependency mapping and impact assessment in complex estates.

Responsibilities

• Lead end-to-end discovery across all technical workstreams.
• Define information requirements and assessment templates for each workstream.
• Build and maintain an integrated Dependency Register across SME groups.
• Define decommissioning approaches including prerequisites, sequencing, and execution.
• Create a decommissioning runbook template covering governance and backup.
• Develop a high-level roadmap and execution strategy.
• Review governance models, RACI, gates, success criteria, and entry checklists.
• Produce consolidated Assessment Reports and discovery deliverables.

Skills

Application decommissioning

Dependency mapping

Stakeholder management

Java/web applications

Cloud infrastructure

IAM/AD & security

Tools

MuleSoft

API integrations

Job description

Gigged AI is an On demand talent marketplace specialising in the IT and technology sector. We have an opportunity live at the moment for an Application Decommissioning Consultant - Outside IR35 - Hybrid/Glasgow within one of our clients.

Location: Glasgow, 2/3 days on site

Duration: Initial 3 months, probable extension

IR35: Outside, pending final determination

Project Overview

A senior consultant is needed to lead the discovery phase of an application decommissioning programme. The role involves coordinating across multiple technical workstreams including Application, Infrastructure, Network, Database, Security, Integration, and Operations. The goal is to gather and reconcile input from SMEs, map dependencies, and develop a clear, governed plan for safely retiring each application.

Key Responsibilities

• Lead end-to-end discovery across all technical workstreams.
• Define information requirements and assessment templates for each workstream.
• Build and maintain an integrated Dependency Register, reconciling findings from SME groups.
• Define recommended decommissioning approaches including prerequisites, sequencing, and execution activities.
• Create a decommissioning runbook template covering workstreams, governance approvals, and backup.
• Develop a high-level roadmap and execution strategy.
• Review and update governance models, RACI, approval gates, success criteria, and entry checklists.
• Produce consolidated Assessment Reports and discovery deliverables identifying benefit trigger points and realisation of benefits.

Required Skills And Experience

• Over 15 years in application/technology consulting, application rationalisation, transformation, or IT service management.
• Proven delivery on application decommissioning, retirement, rationalisation, or modernisation programmes.
• Hands-on experience with application dependency mapping and impact assessment in complex enterprise environments.
• Strong technical knowledge in Java/web applications, APIs and integrations, databases, batch processing, cloud infrastructure, network dependencies, IAM/Active Directory, certificates, and monitoring/operational tooling.
• Confidence in challenging technical findings and identifying gaps.
• Skilled in facilitating workshops with multiple SMEs and strong stakeholder management.

Desirable Skills

• Application portfolio rationalisation and large-scale legacy retirement programmes.
• Data retention and archival.
• Cloud migration/modernisation on AWS or Azure.
• Experience with Java/Oracle ecosystems and MuleSoft/API integrations.
• Knowledge of ITIL/service management and enterprise architecture.

Deliverables

• Integrated Dependency Register.
• Decommissioning approach plans and runbook templates.
• High-level roadmap and execution strategy documents.
• Updated governance models and success criteria.
• Consolidated Assessment Report and supporting deliverables.