Mark Whitfield is an SC-cleared Senior IT Project and Engagement Manager with over three decades of professional experience (1990–present) deeply rooted in fault-tolerant HPE NonStop (formerly Tandem Computers) NonStop Kernel (NSK) systems.
His career timeline transitions from hands-on platform engineering to enterprise product management, infrastructure monitoring, and high-value digital transformations.
💼 1. Early Engineering & Banking Foundations Era (1990–1995)
Operating as a Programmer and Lead Analyst for The Software Partnership (TSP) (acquired by Deluxe Data International in 1994), Whitfield engineered foundational multi-user electronic corporate desktop banking platforms prior to mainstream internet adoption.
- Core Platforms & Applications: Worked extensively on the sp/ARCHITECT-BANK Engine—built natively for Tandem Mainframes—which later evolved into the globally utilized CONNEX Advantage payment platform.
- Blue-Chip Deliveries: Wrote, optimized, and deployed mission-critical transaction logic for major financial institutions including TSB, Bank of Scotland, Rabobank (Utrecht), Girofon (Denmark), and Royal Bank of Scotland (RBS).
- On-Site Bank Implementations: Conducted direct, client-facing system code configuration and delivery on-site at the Barclays facility in Knutsford for the Barclays Business Master II (BBM II) system.
- Tandem / NSK Subsystems & Toolset: Natively programmed inside the Tandem Guardian OS environment using COBOL85, TAL (Tandem Application Language), NonStop SQL, and Screen COBOL (SCOBOL) for 6530 terminal setups. He heavily utilized critical platform utilities like PATHWAY (OLTP middleware), SCF, FUP, INSPECT, and XPNET.
🚀 2. Enterprise Product Management & Systems Automation Era (1995–2013)
During his 18-year career at Insider Technologies Limited (ITL) in Manchester, he scaled from Senior Programmer to Lead Designer and ultimately IT Product & Project Manager, overseeing the full software development lifecycle (SDLC).
- The Reflex Platform (Reflex 80:20 & Reflex ONE24): Co-developed and managed high-availability diagnostic plugin modules to monitor platform health across Guardian operating system workloads.
- Console Module: Engineered real-time filtering and tracking of Tandem EMS (Event Management Service) logs.
- Status Monitor: Monitored complex hardware/software system layers (CPU, Disks, Processes, WebSphere MQ, XPNET, TCP/IP).
- Service Monitor: Constructed rule-based, multi-line logic engines to track general enterprise SLA metrics.
- CRESTCo (Euroclear) Benchmark Consultant (1997): Handled a highly specific consulting placement at CRESTCo in London to architect custom high-volume performance testing and throughput benchmarking utilities within their live Tandem mainframe clusters.
- High-Value Integrations: Led payment engine configurations, technical cross-platform rollouts, and electronic transaction utilities bridging BASE24, EPS, and MultiBatch backend systems.
- Global Deployments: Commanded the rollout of the RTLX (Real-Time Log Extraction) Reactor Suite for global networks like Al Rajhi Bank (Saudi Arabia), transferring critical mainframe transaction logs into modern open databases.
- Thought Leadership (2013): Authored an architectural white paper in The Connection (the global HPE NonStop professional journal) titled “Episode IV – A New Hope”, establishing a blueprint for streaming legacy mainframe architecture data into modern, open Big Data systems.
🛡️ 3. Modern Enterprise Leadership & Digital Transformations (2013–Present)
Transitioning into high-stakes executive consultancy across Wincor Nixdorf, Betfred, and Capgemini UK (where he serves as a Senior Engagement and Delivery Manager), Whitfield blends classic high-availability Tandem architecture expertise with modern governance frameworks.
- Core Banking Swaps: Managed a £5m+ HP NonStop core swap and log monitoring infrastructure overhaul for major retail banking giants, maintaining 100% operational uptime.
- Hybrid Cloud Architecture: Spearheaded secure cloud integration programs, bridging legacy, fault-tolerant mainframe clusters (like HPE NonStop X frameworks) securely with modern cloud fabrics and API environments, including AWS, Azure, and MuleSoft API-led layers.
- Cross-Sector Governance: Deployed high-availability service assurance and agile programs for highly regulated organizations such as Lloyds Banking Group, Jaguar Land Rover (JLR), Royal Mail Group, and the Bank of England.
Mark Whitfield, HPE NonStop Tandem experience since 1990 above
