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Walter Hjelmar

VP of Platforms and Data Services at Group 1001

  • IT Strategy
  • Digital Operating Models
  • Enterprise Architecture
  • Data Architecture and DataOps
  • Business and Service Management

I have over 30 years of IT experience, primarily focused on the financial sector. He has held senior posts in strategy, engineering, operations, program management, web architecture and enterprise management for Hedge Funds, Investment Banks and Wealth Management firms. I've been the lead architect for 3 different Wall Street trading floor programs -- front and backend services.

Today, I specialize in technology strategy, Digital Operating Models, service management and large complex cross-platform technical program management and run the Consulting Practice for Synechron North America.

Sample of some of the consulting roles I've performed:

  • Lead Trading Floor Architect for 3,000+ position trading floor for tier 1 Securities firm.

  • Interim Head of Capacity and Demand Management for Global 100 Airline. Developed the Target Operating Model, organization structure and required tooling for the team.

  • Developed the Target Operating Model for Product and Portfolio Management strategy for one of the world's leading independent, end-to-end IT services and solutions companies.

  • Managed global program team to identify Operating Model and Technology improvements which allowed the realization of promised redundancies by a merger of two Fortune 500 firms.

  • Interim Head of Application Performance Management and Enterprise Monitoring for Global 100 Airline. Designed a 5-year roadmap for the organization and a target operating model to achieve it and led the program to roll out new tools including APM, NPM and synthetic monitoring platforms.

  • Designed strategy to migrate Core Compute, Storage and Database services to Platform as a Service (PaaS) hybrid cloud model for tier 1 investment bank.

  • Negotiated multi-national vendor sourcing contract, saving a tier 1 bank 15% of its annual reoccurring service costs, while increasing service levels across the board, and designed contractual SLA structure that governed the relationship.

  • Interim Head of End-User Computing team for top Hedge Fund.

  • Designed a program to measure software development quality across all lines of business for a tier 1 bank which normalized the results for multiple SDLC methodologies and supporting tool chains

  • Ran a global program for a leading tier 1 bank to assess 13 of their most mission critical applications to produce a predictive risk analysis of the application platforms, leading to improved security and reduced risk.

  • Managed Site Reliability Engineering team, spanning six countries, esponsible for over 8,000 internal and external Apache/Tomcat and IIS/ASP.NET web applications and the load balancing and proxy infrastructure that supports them.

  • Built Production Support team responsible for UNIX and Windows Servers, SAN/NAS and WAAS infrastructure, Core Enterprise Services (DNS/DHCP/Load Balancing/File Transfer); Enterprise Management, Virtualization, and Blade Hardware.

  • Architected and rolled out VPN & Firewall infrastructure for mid-sized bank.

  • Architected software distribution, fault and performance monitoring system (supporting 30,000+ desktops and 4,000+ heterogeneous servers) for tier 1 insurance firm.

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Walter Hjelmar's Projects

ai-linkscribe icon ai-linkscribe

Go through you list of bookmarks and have ChatGPT summarize the pages for your Obsidian Vault

citihubstyle icon citihubstyle

R ggplot theme that standardizes on the Citihub palette and conventions

dotfiles-fork icon dotfiles-fork

:wrench: .files, including ~/.macos — sensible hacker defaults for macOS

get_meetings icon get_meetings

A powershell script to connect to an Outlook calendar, grab the list of upcoming meetings and create Markdown file for Obsidian

tidytuesday icon tidytuesday

This repository contains the R code used to produce my visualisations for the TidyTuesday challenges. You can follow my attempts on Twitter: @nrennie35.

videos icon videos

Code for the manim-generated scenes used in 3blue1brown videos

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