Senior Engineer - CMDB OT & Discovery

Overview

Serve as the subject-matter guide for OT configuration data in ServiceNow, integrating authoritative sources such as Claroty xDome to keep a trusted, auditable view of Operational Technology that supports manufacturing resilience across AstraZeneca's plants.

What you'll do

• Maintain an accurate, reconciled inventory of in-scope OT assets in ServiceNow with owners, support groups, locations and lifecycle status aligned to authoritative sources.
• Define and enforce OT CI classifications, required attributes, relationships and onboarding standards.
• Drive discovery coverage across sites and zones using passive approaches and trusted OT platforms, avoiding unnecessary active scanning and respecting production constraints.
• Govern onboarding through retirement, validate stale or absent assets with owners and prevent reappearance of retired CIs while retaining required history.
• Act as the CMDB specialist for Claroty xDome data, maintaining device-type, class and attribute mappings and monitoring end-to-end data flow from discovery source to CI creation and updates.
• Investigate failed jobs, mapping errors, duplicates and source-to-target discrepancies; coordinate fixes and validate outcomes.
• Set source precedence to protect authoritative OT data and retain full traceability; collaborate with CMDB/integration engineering on complex IRE changes.
• Build and maintain dependencies linking manufacturing services and applications, including PAS-X and TrakSYS, to OT systems, servers, databases, middleware, interfaces, networks, gateways, cloud/platform services and OT devices.
• Validate critical dependencies with application owners and OT engineers, identify and remediate gaps or orphaned assets, and periodically certify high-impact relationships to enable reliable impact analysis.
• Own OT-specific data quality analysis for completeness, correctness, compliance, freshness and relationship coverage; establish preventative controls and coordinate remediation with source owners.
• Maintain documentation for sources, mappings, modeling decisions and controls, and provide configuration evidence for audit and regulatory requests.
• Translate OT needs into actionable CMDB requirements and working standards, and guide collaborators on CMDB guidelines.

What you'll need

• Bachelor's degree in Engineering, Computer Science or Information Technology, or equivalent experience.
• 6–9 years of experience in asset management, configuration management, CMDB, discovery or cyber visibility roles.
• At least 3 years of experience in OT or industrial environments.
• Hands-on experience with ServiceNow CMDB, including CI classes, attributes, relationships, the Identification and Matching Engine (IRE) and source reconciliation principles.
• Practical experience with OT asset discovery or inventory platforms, such as Claroty, and integrating authoritative inventory data into a CMDB.
• Understanding of IT/OT infrastructure, including Windows/Linux, networking, virtualisation, databases and industrial devices.
• Familiarity with the Purdue model and ISA/IEC 62443 principles.
• Ability to model IT-to-OT and service dependencies from technical and process information and validate them with engineers and application owners.
• Understanding of ITIL Configuration Management and Change processes, with respect for OT safety, production constraints and controlled discovery practices.
• Strong analytical, fix, communication and stakeholder-engagement skills, including independent investigation of complex cross-platform configuration and data-quality issues.

Nice to have

• Experience with Claroty xDome/CTD, ServiceNow Discovery, Operational Technology Management, Service Graph Connectors, IntegrationHub ETL and the Common Service Data Model (CSDM).
• Experience with manufacturing execution systems (MES), such as PAS-X or TrakSYS.
• Familiarity with programmable logic controllers (PLCs), SCADA, distributed control systems (DCS) and historians.
• Experience in pharmaceutical, life sciences or other regulated manufacturing environments, including GxP validation and change-control practices.
• Experience working across cultures and time zones in a Global Technology Centre operating model, with familiarity with Agile and Scrum methodologies.

Details

• Location: Chennai, India.
• Work mode: in-person, a minimum of three days per week from the office.
• Globally distributed team across the UK and the Chennai technology hub.
• Date posted 09-Nov-2026; closing date 13-Nov-2026.