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The ServiceNow CMDB / CSDM Architect will act as the technical design authority for a CMDB uplift programme of work. The role will assess the current CMDB model, define pragmatic CSDM-aligned standards, guide remediation of service and application taxonomy issues, review IRE and data source precedence, shape service-to-infrastructure mapping, and design platform controls that improve ownership, lifecycle discipline and data quality. The role is expected to provide expert technical direction, not simply produce documentation. The candidate must be comfortable working in a complex existing ServiceNow environment where the CMDB requires remediation, simplification and operationalisation.
Job Responsibility
Assess and improve CMDB structure, CI classes, attributes and relationships
Define practical CSDM-aligned modelling standards
Clarify how Business Services, Application Services, Technical Services, Applications and infrastructure CIs should be represented
Support service and application taxonomy reset activity
Provide design guidance for simplifying CI classes, attributes and relationship usage
Review current Identification and Reconciliation Engine configuration
Identify issues with source precedence, duplicate creation, reconciliation conflicts and poor upstream data
Recommend authoritative source rules by CI class and key attribute
Translate agreed data ownership and source rules into ServiceNow configuration guidance
Support design of data contracts and integration onboarding controls
Review current Discovery and relationship outputs
Define minimum relationship standards for priority CI classes
Shape the approach for service-to-infrastructure mapping
Advise on Service Mapping readiness, sequencing and prerequisites
Ensure dependency modelling supports change, incident, vulnerability and operational resilience use cases
Design technical controls to enforce ownership, lifecycle and data quality rules
Specify requirements for ownership gating, lifecycle guardrails, stale CI handling, certification workflows and readiness gates
Work with ServiceNow developers to ensure controls are implemented in a maintainable, upgrade-safe way
Review delivered configuration for technical quality and alignment to the target CMDB model
Guide duplicate, orphan and stale CI remediation approaches
Help define CMDB Health rules, dashboards and data quality measures
Support prioritisation of remediation activity by operational value and risk
Advise on how to prevent recurrence of data quality issues through source controls and platform automation
Mentor the internal ServiceNow specialist
Document key design decisions, standards and configuration principles
Provide clear artefacts and handover material to sustain the CMDB model after the contractor engagement
Requirements
ServiceNow CMDB architecture
Hands-on CSDM implementation, remediation or uplift
CI class design and relationship modelling
ServiceNow IRE: identification rules, reconciliation rules and source precedence
CMDB Health, duplicate management and data quality rules
ServiceNow Discovery and discovered infrastructure relationships
Service Mapping concepts and implementation readiness
Integration patterns involving CMDB data sources
CMDB lifecycle, ownership and data quality controls
Working with existing, imperfect CMDBs rather than only greenfield implementations
Translating business/governance requirements into ServiceNow technical design
Nice to have
ServiceNow Certified Implementation Specialist qualifications in Discovery, Service Mapping, ITOM, CMDB or related modules
Experience with Service Graph Connectors
Cloud CMDB integration experience across Azure, AWS or GCP
Experience with CNAPP or cloud security data feeding CMDB
ITIL SACM / ITSM experience
Experience in large enterprise or regulated environments
Experience mentoring internal teams during a transformation or uplift programme