Senior Systems Engineer - Advanced SQL/Tier 2 Support

Job Description
Senior Systems Engineer
London, United Kingdom
Full-time, Permanent
3 Days Onsite - Hybrid
The Senior Systems Engineer is a Tier 2 support role responsible for the stability, performance, and continuous improvement of business critical applications supporting the Global Financial Solutions (GFS) business unit. This role acts as the technical escalation point from Tier 1, provides deep application and systems expertise, and partners closely with development, infrastructure, and business stakeholders to resolve incidents, prevent recurrence, and improve service quality.
A critical aspect of this role is strong Microsoft SQL Server expertise, including the ability to analyze data issues, support reporting, troubleshoot performance problems, and safely execute data related activities in line with operational and regulatory controls.
The ideal candidate combines strong technical troubleshooting skills with a service oriented mindset and a solid understanding of financial services operational requirements.
Key Responsibilities:

• Provide Tier 2 support for GFS applications, including investigation, diagnosis, and resolution of complex incidents not resolved at Tier 1
• Act as an escalation point for application-related issues, ensuring timely resolution in line with SLAs and business priorities
• Investigate incidents across application, database, and infrastructure layers
• Manage incidents through to resolution, ensuring accurate documentation and stakeholder communication
• Participate in major incident bridges, providing clear technical leadership and communication
• Provide advanced support for MS SQL Server, including: writing and analyzing SQL queries, investigating data integrity and data quality issues, supporting application reporting and extracts, and troubleshooting performance and blocking issues
• Analyze SQL logs, queries, indexes, and execution plans to diagnose issues
• Work closely with DBAs and development teams on database-related incidents and improvements
• Monitor application health, performance, and availability using enterprise monitoring tools. Identify trends and proactively address potential issues before they impact the business
• Partner with infrastructure and platform teams to ensure systems are resilient, scalable, and secure
• Support application releases, patches, and configuration changes, including validation and post-deployment monitoring
• Review and assess changes for risk and operational readiness
• Collaborate closely with GFS business users to understand application usage, pain points, and operational needs
• Provide clear, concise communication to both technical and non-technical stakeholders
• Create and maintain technical documentation, runbooks, and support procedures
• Contribute to knowledge articles to improve Tier 1 resolution rates and reduce incident volumes
• Identify opportunities to improve application reliability, supportability, and operational efficiency
• Support automation efforts for monitoring, alerting, and routine operational tasks
• Promote best practices in application support, security, and compliance

Required Skills & Experience:

• Strong experience supporting enterprise applications in a production environment
• Advanced Microsoft SQL Server Skills, including:
  • Complex SQL querying and data analysis
  • Understanding of indexing, query optimization, and performance tuning
  • Experience supporting reporting and data extracts
• Solid understanding of:
  • Application architecture and integrations
  • Operating systems (Windows)
  • APIs, batch processing, and job scheduling
• Experience with monitoring, logging, and alerting tools
• Ability to troubleshoot across application, infrastructure, and integration layers
• Typically 5+ years in application support, or a similar role
• Proven experience in a Tier 2 or Tier 3 support function
• Experience supporting systems in a financial services or regulated environment is strongly preferred
• Strong analytical and problem-solving skills
• Calm, methodical approach when working under pressure
• Excellent written and verbal communication skills
• Ability to manage multiple priorities and incidents concurrently
• 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
• Relevant technical certifications (cloud, database, OS, or application platforms) are a plus

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.