Andrew Johnston: Professional Consulting Services

Case Study - Data Centre Migration for IBM / National Grid Plc (2012 – 2013)


Migration of National Grid’s business systems to a new “private cloud” at CSC data centres

Key Outcomes

Successful migration of the majority of systems, leading to reduced IS costs and a better alignment with the new regulatory funding regime. Modernisation or rationalisation of several legacy systems.

Key Challenges

Complex multi-party supplier structure. Aged legacy systems with unsupported technologies and limited documentation / knowledge

Key Technologies

Various Windows and Unix server OSs and hosting arrangements. Virtualisation and physical migration. Wide variety of application and client technologies. Networking including firewalls and extranet.


National Grid contracted with CSC to re-host the majority of their systems in new CSC data centres. I worked as the lead architect for the IBM team supporting that programme, planning and assuring the migrations from an application perspective. This required building a comprehensive understanding of around 50 complex and legacy applications to identify an appropriate migration approach, required remediation work and appropriate testing for every application. I also had to ensure that the preparations being made by IBM, CSC, networking partners and third party application vendors would provide for a “joined up” and low risk migration of each application in the IBM support portfolio.

It became apparent early on in the programme that there were few established processes and templates suitable to the National Grid situation, and I led a multi-partner exercise to progressively develop a suite of guidelines, documents and processes which could be repeatably applied by various teams to develop the required understanding for each application in turn.

During the actual migrations I took an active coordinating and troubleshooting role, on several occasions identifying the source of issues and their likely resolution.


© Questa Computing Ltd. 2014
Page last updated 03 January, 2014 13:25

Questa Computing Ltd. is registered in England and Wales number:2889117.
Registered office: Ember House, 35-37 Creek Road, East Molesey, KT8 9BE UK
For credits, copyright details and cookie policy, see here.

Search my Sites:

Share this page:

Share |


Favourite/Major Articles
All Articles by Category
All Articles by Title
Review Index

Site Map:

Welcome / Home Page
Contact Me
Search the Site
Thoughts on the World
Consultancy Services
An introduction
Key Skills
Career Summary
Case Studies
IT Knowledge/Education
Customer Profiles
Training Courses
Previous Experience
Download Full CV
National Grid Group Plc
British Energy Power and Energy Trading
Legal Marketing Services Ltd.
Marks and Spencer Plc
Faith Footwear Ltd.
Barclays Sales Financing Ltd.
Oracle Corporation UK Ltd.
Livingston Rental Group Ltd.
National Power Plc.
Agile Development
Coding Projects & Thoughts
General Thoughts
Products and Projects
Reviews: Books, Music & Films
Website Announcements
Full Index
Publications and Papers
A Hacker's Guide to Project Management
Conference Papers
Agile Architecture
Practical Enterprise Integration
Modelling an Enterprise Data Architecture
Strategies for Flexibility
Getting Sizing Right
Muzzling the Alligators
Evolution of a Test Method
Photography Articles & Discussion
Photo Gallery
Projects and Products
RelQuest - Reliability Modelling Tool
ConQuest - Container Yard Management System
Full Index
Biography and Personal Endeavour
Construction & Civil Engineering
Human-Computer Interaction
Mathematics & Statistics
Military & 20th Century History
Modelling & Analysis
Photography & Photographers
Physics & Cosmology
Project & People Management
Psychology & Human Behaviour
Science, General

Contact Me

Email me

Feeds and Tweets

Follow me on Twitter


Thoughts on the World
(main feed)

Feedburner XML
RSS Version XML (direct)

How many subscribers?

Other Feeds

Professional Blog
Photo Blog
Photo Album
Review Pages

About my feeds

Google Blog Search

References to
References to

Sister Sites: