Senior Systems Engineer

Job Description
Senior Systems Engineer
St. Helier, Jersey or London, England
Full-time, Permanent role.
Hybrid - 3 days onsite. (Monday - Friday, 9.00am - 5.30pm.)
The Senior Systems Engineer is a Tier 2 application support role responsible for the effective operation, configuration, and functional support of the NavOne application (Quantios) supporting the Global Financial Solutions (GFS) business unit. This role provides deep expertise in NavOne functionality and acts as a key escalation point for complex functional, configuration, and data related issues.
A core requirement of this role is strong Microsoft SQL Server capability, used to support complex troubleshooting, data analysis, reporting, and controlled data updates. The role balances operational support with functional ownership, documentation, and user enablement in a regulated financial services environment.
Key Responsibilities:

• Provide Tier 2 support for the NavOne application, resolving complex incidents and service requests escalated from Tier 1
• Act as a functional and technical escalation point for NavOne-related issues
• Troubleshoot issues spanning application functionality, configuration, RBAC, and data
• Own incidents through to resolution, ensuring accurate documentation and clear stakeholder communication
• Maintain a deep understanding of NavOne functionality, modules, workflows, and business use cases
• Support business users with functional guidance and best-practice usage
• Translate business requirements into effective application configuration and support approaches
• Configure and maintain NavOne application settings to support business and operational requirements
• Support application updates, patches, and vendor releases.
• Support functional testing and validation during application updates and vendor releases
• Ensure configuration changes are documented, controlled, and supportable
• Provide advanced SQL support for NavOne by writing and analysing complex SQL queries, stored procedures, and views, investigating data integrity, reconciliation, and reporting issues, and supporting data extracts and operational reporting.
• Diagnose performance issues using query analysis, execution plans, and indexing insights
• Perform controlled data fixes and updates in line with change management and audit requirements
• Collaborate with DBAs and vendors on database-related issues and optimizations
• Create and maintain NavOne documentation, including user manuals, functional guides, and runbooks
• Participate in major incidents involving NavOne, providing functional and technical leadership
• Lead or contribute to root cause analysis for recurring or high-impact issues
• Liaise with Quantios vendor support to raise defects, clarify functionality, and track resolutions
• Support regulatory reporting requirements, including FATCA and CRS, ensuring data accuracy, completeness, and alignment with compliance standards

Required Skills & Experience:

• Strong hands-on experience supporting NavOne (Quantios) in a production environment
• Deep understanding of NavOne functionality, workflows, application configuration and updates.
• Advanced Microsoft SQL Server skills, including complex querying and data analysis, performance troubleshooting and optimisation, and reporting and data extract support.
• Typically 5+ years of experience in application support
• Proven experience operating in a Tier 2 application support role
• Experience supporting applications in a financial services or regulated environment is strongly preferred
• Strong analytical and problem-solving skills
• Ability to communicate complex functional and technical topics clearly
• High attention to detail, particularly around data, access, and configuration
• Strong sense of ownership and accountability
• Bachelor's degree in Computer Science, Information Systems, or a related field, or equivalent experience
• ITIL Foundation or higher
• Working knowledge of regulatory reporting frameworks such as FATCA and CRS, including data handling, reconciliation, and reporting processes

About Us
CSC is a global business, legal, and financial services company based in Wilmington, Delaware, USA, providing knowledge-based solutions to clients worldwide. We have offices and capabilities in over 140 jurisdictions in the Americas, Europe, Asia Pacific, and the Middle East, and more than 8,000 colleagues. We are the business behind business.®
Visit our careers site to learn more about CSC and our commitment to our clients, communities, and each other.
CSC is committed to creating a feeling of belonging through a diverse and growth-oriented environment where everyone is valued.
CSC colleagues have global career opportunities and excellent benefits, including annual success-sharing bonuses or commission plans based on individual performance. To learn more, visit cscglobal.com/service/careers.
We offer a range of support to colleagues with disabilities, ensuring people have the necessary resources to thrive in their roles. We encourage candidates to work closely with our talent acquisition partners to convey their specific needs. Our commitment to accessibility reflects our broader dedication to diversity and belonging,
CSC only accepts resumes from employment agencies that are part of our approved supplier program. Resumes submitted from other agencies either to talent acquisition, our hiring leaders, employees, or through any other mechanism other than our supplier process, will not be eligible to claim related fees and the submitted resumes will be considered property of CSC.
We encourage candidates to apply directly to our website and not through third-party sources.
Disclaimer: The information above describes the general nature and level of work performed by employees in this role. It is not intended to describe all duties, responsibilities, and qualifications.
About the Team
At CSC®, we're always looking ahead, finding ways to innovate, challenge the status quo, and anticipate the needs of our clients. We exceed expectations by adapting client ambitions and goals as our own. This Fierce Client Spirit has helped us adapt and create solutions that have enabled businesses to run smoother and smarter for more than 125 years. It's also the reason we're the trusted partner of many of the world's most successful organizations.
CSC is committed to attracting, developing, and retaining talented people whose values align with ours. We empower our colleagues to bring the right solutions to market to meet client demand. That's why we are the leading provider of business administration and compliance solutions.

• CSC is a great place to work with smart and dedicated people.
• We have won several employer recognition awards, including Top Workplace USA, Great Places to Work India, and Built In's Best Places to Work.
• We offer fulfilling work and career opportunities. Most positions are filled with internal moves and employee referrals.
• Employees are eligible for Success Sharing, bonuses, or commission plans based on role and individual performance.
• CSC offers a competitive and comprehensive benefits package that includes annual leave, tuition reimbursement, referral bonuses, and more.
• As business needs allow, CSC offers hybrid or remote work schedules in alignment with local regulations. Specific details for this position will be discussed during the interview process.

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