Exalto Consulting is supporting a secure government programme seeking an experienced Siebel Developer to contribute to the ongoing development and enhancement of a highly customised CRM platform. This role sits within a structured, delivery-focused environment where reliability, security, and quality of implementation are critical. You will work as part of an established engineering team responsible for maintaining and improving a complex Siebel estate that supports operational outcomes of national importance. Due to the nature of the programme, all project-specific details remain confidential. Role Responsibilities You will play a hands-on role in the design, development and support of a bespoke Siebel CRM implementation. Responsibilities include: Enhancing and maintaining Siebel applications within a secure, high-availability environment Designing and implementing solutions aligned to established engineering standards and best practice Configuring Siebel components using Siebel Tools Developing and maintaining Siebel eScript and workflows Supporting integration across systems using Siebel EAI and EIM Working with Oracle databases to support application functionality and performance Contributing to troubleshooting and resolution of complex technical issues Collaborating with wider engineering and delivery teams to ensure stable and effective releases Required Skills and Experience Strong experience with Siebel CRM development (ideally Siebel 2017 or later) Proven capability in: Siebel Tools configuration Siebel eScript development Workflow design and development Enterprise Application Integration (EAI) Data migration using EIM Solid working knowledge of Oracle SQL Experience working in secure or regulated environments Ability to analyse problems and deliver practical, maintainable solutions Desirable Experience Exposure to Oracle Cloud environments Experience integrating Siebel with modern cloud-based platforms Background in government, defence, or similarly secure programmes Security & Eligibility Requirements This role requires active Security Check (SC) clearance that is transferable and meets standard validity criteria. Applicants must: Be sole UK nationals (no dual nationality) Hold a valid UK passport Have recent experience working in a cleared environment Meet standard residency and clearance continuity requirements Full details can be discussed confidentially during the screening process. Working Environment This is a structured and process-driven delivery environment where collaboration, accountability and attention to detail are essential. The work is meaningful, with a clear focus on supporting critical national services. How to Apply If you meet the clearance requirements and have strong Siebel development experience, we welcome a confidential discussion. Exalto Consulting will handle all applications with discretion and respect for the sensitive nature of this programme.