Senior Core Banking Systems Specialist

Marco Danel S.J. Reyes

I keep Singapore's core banking and payment systems running, and I deliver the enhancements that change them. 27+ years in IT, 18+ in banking.

  • Silverlake SIBS
  • CASA
  • FAST
  • GIRO
  • SWIFT
  • IBM AS/400
Portrait of Marco Danel S.J. Reyes in a dark blazer and white shirt

About

Senior Core Banking Systems Specialist based in Singapore, with deep expertise in the Silverlake Integrated Banking System (SIBS), core banking operations, payments processing, CASA, application support and business analysis.

I implement system enhancements, run impact assessments, manage production support and coordinate testing. I work with business stakeholders, operations teams, vendors and technology groups to deliver mission-critical banking solutions.

IT experience
27+ years
Singapore banking
18+ years
Banks served
CIMB, Maybank, OCBC

Experience

Select a row to see responsibilities.

May 2011 – May 2026Core Banking Systems Technical Senior SpecialistCIMB Bank Berhad, Singapore15 yrs
  • Served as Subject Matter Expert (SME) for the Silverlake Integrated Banking System (SIBS), supporting core banking and payment services.
  • Performed impact analysis and solution assessment for new business initiatives, regulatory changes and system enhancements.
  • Delivered application enhancements, integration initiatives, system configuration and implementation across core banking platforms.
  • Worked with business users, operations teams, project managers and vendors to define and implement banking solutions.
  • Managed production incidents, root-cause investigations and problem resolution for mission-critical systems.
  • Supported high-volume CASA and payments processing, ensuring service availability and operational stability.
  • Coordinated deployment, implementation verification and post-production support.
  • Facilitated SIT, UAT and production rollout for banking projects and enhancements.
  • Managed third-party vendors and integration partners for timely, high-quality delivery.
  • Led and mentored junior team members, supporting knowledge management and service improvement.

Key accomplishments

  • Delivered multiple core banking and payment channel enhancement projects supporting business growth and banking transformation.
  • Maintained stability and operational resilience of critical banking applications.
  • Supported production operations and end-of-day (EOD) processing.
  • Improved incident resolution through structured problem management and stakeholder coordination.
May 2010 – May 2011System AnalystMalayan Banking Berhad (Maybank), Singapore1 yr
  • Supported and enhanced core banking applications and business systems, including SIBS.
  • Managed production issue resolution and performed system analysis for change requests.
  • Coordinated UAT activities and user training programmes.
  • Took part in security implementation and configuration management initiatives.
Jun 2009 – Mar 2010Software EngineerMisys Philippines10 mos
  • Developed and maintained banking software solutions.
  • Produced technical documentation and system specifications.
  • Ran testing, quality assurance and performance optimisation.
Jan 2008 – Jun 2009Retail Banking Application Support AnalystOCBC Bank, Singapore1 yr 5 mos
  • Supported retail banking applications and production systems, including SIBS environments.
  • Delivered enhancements for the Baby Bonus Project and retail banking services.
  • Coordinated SIT and UAT with business users.

Expertise

Banking domain

  • Silverlake Integrated Banking System (SIBS)
  • Core banking systems
  • CASA
  • Payments processing
  • FAST / GIRO / SWIFT
  • Settlement & reconciliation
  • Banking operations support
  • Regulatory enhancements
  • End-of-day (EOD) processing

Business analysis

  • Requirements gathering
  • Impact analysis
  • Gap analysis
  • Functional specification
  • Stakeholder management
  • Change management
  • Process improvement
  • UAT
  • SIT

Technical

  • IBM AS/400 (iSeries)
  • RPG/400
  • RPG ILE
  • CL / CLLE
  • SQL/400
  • DB2/400
  • Aldon CMS
  • Application support
  • Incident & problem management
  • Production deployment

Leadership

  • Vendor coordination
  • Production support governance
  • Technical leadership
  • Team mentoring
  • Project coordination

Education

Bachelor of Science in Electronics & Communications Engineering1992 – 1997

Contact

Open to conversations about core banking, payments and application support roles in Singapore.