Dennis Leslie

Dennis Leslie

Verified

Senior Cutover Manager and Data Migration Lead

United Kingdom

LinkedIn

About

I am a well-seasoned Data Migration and Cutover IT professional with over 25 years of experience. I have deep overall transformation project experienced attained through working on large and smaller transformation and ERP projects around the globe. My emphasis is on the mentoring and development of the teams I work with and lead, while keeping a firm eye and grip on the overall delivery both to time and budget. I have a heavy SAP background however my experience includes multiple D365, Workday, Oracle and BSS system as well as a host of other up and downstream peripheral systems. My approach to every engagement is inclusive from the IT teams who deliver extracted raw data to the business and functions teams who validate the end result. I encourage excellence and example setting while allowing as much autonomy to get the very best out of my teams to ensure successful and timely delivery.

Experience
15+ years
Location
United Kingdom
Contract preference
Contract
Contract location
Hybrid, Remote
Languages
English

Applications

ERP HRIS Finance CRM

Systems

SAP ECC Workday HCM SAP S/4HANA Workday Finance Microsoft Dynamics 365

Industries

Retail & eCommerce Manufacturing

Skills

Data Migration Client Relationship Management Change Management Delegation Leadership Project Management Stakeholder Management Budget Management

Cutover Experience

Digicel Shapes Global Cutover Lead

Digicel Group Kingston Jamaica

Jan 2022 – present
Hybrid

Digicel Group Kingston Jamaica – Singleview BSS, IAT, IME, Telflow PCRF Azure DWH, Payment Gateway, Transact Web POS, eShop, MDA, IVR, Customer Connect, Commerce Engine.
Digicel has undertaken a comprehensive business transformation project to completely overhaul its BSS and related customer-facing technologies by reducing its legacy landscape by approx. 64 systems and replacing or upgrading these with 24 differing systems. The main objective of this vast transformation is to:
  • Modernize technical capabilities.
  • Improve the technological infrastructure.
  • Improve customer experience with a simplified product and service catalogue.
In turn, this will maintain and improve their competitive advantage within the marketplace via dynamic pricing, intuitive customer experience and real-time product and service offers. 

My role in this multi-system, multi-market project is as the Data Migration and Cutover Manager with a team of approx. 27 people covering all data-related disciplines from the collection of reference data, data cleansing, data migration code development and managing a team of data migration SME’s analysts.
In addition to managing all the major data-related activities on the project for Digicel, my role required a much larger amount of time being spent on developing the various data-related methodologies and processes to enable the other project aspects such as:
  • Development of a global data migration strategy and approach.
  • Supporting the Technical Program director to ensure that technical requirements across the project are fully understood and met within the data-related arenas on the Shapes project.
  • Support project and project PMs with associated project/system deliveries to support migration and cutover timelines.
  • Managing migration and data-related program budgets and resources.
  • Development and execution of the Shapes “Go to Market” approach to prepare the markets for the oncoming business transformation change.
  • Migration team development and mentoring- As many of the team were new to the tools and practice of data migration.
  • Development of a data factory delivery model for migration technical delivery utilizing Azure ADF & Data Bricks.
  • Performance testing planning and data delivery.
  • SIT, UAT functional testing scoping and supporting data requirements.
  • Support in the development & delivery of the new Single View/Telflow Product Catalogue and working closely with the business commercial teams to align their requirements in this area. 
  • Reference data collection and validation
  • Data cleansing requirements and rule development.
  • Trial Migration process development and execution. 
My role as Cutover Manager required me to maintain a focused delivery approach based on the project timelines and ensure that all cutover-related tasks were captured, understood and executed across the different lines of business as they were rolled out.
These included
  • Develop a technical cutover plan
  • Develop a business cutover plan
  • Ensure that the testing entry and exit gate requirements are fully met through the various fazes of the project.
  • Deliver project dry runs and dress rehearsal activities and plans.
  • Develop business and technical rollback plans.
  • Develop hypercare processes and models.
  • Ensure a smooth transition from the legacy landscape and business process to the new Singleview BSS platform and associated systems.
ERP

Powered Finance Data Migration and Cutover Manager

Digicel Group Kingston Jamaica

Nov 2020 – Dec 2021
Hybrid

Workday Finance, Adaptive, Consolidation
Working as a part of the Finance Transformation throughout the Digicel organization in the Atlantic, Caribbean and South Pacific region.

Playing a key role as part of the project leadership team:
  • Work Stream lead for Cutover, Data Migration and Data Cleansing work streams. 
  • Multi-country team, located in India, UK, USA, and Jamaica numbering a maximum of up to 18 full-time resources. 
  • Played an instrumental role in the operational set-up of the Digicel Jamaica SSC in Kingston Jamaica. 
  • Managed and developed the process of migration of over 240 business entities to WD both HoldCo’s and trading entities.
  • Development for multi-country, multi-time zone cutover approach and strategy both technical and business cutover which included a number of legacy GP & Quick books finance systems, WorkPlace procurement systems, various billing systems, Success Factors HR systems, and Rydoo Expense system.
  • Led teams in the development of data cleansing strategies and execution with multiple market entities and their local leadership.
  • Development of multi-wave data migration and approach for GL & SL data.
  • Development of data reconciliation and sign of processes and procedures at both the GL & sub-ledger data.
  • Supporting testing, OCM & Training, billing and payments integration development functions as well as playing a role in MEC BAU functions in support of the business.
  • Fully conversant with all aspects of project delivery with longstanding knowledge of pitfalls, traps and low-hanging fruit.
  • Mentoring, training and development of team & more junior project members.
  • Ability to work with multiple stakeholders both internal and external.
  • Delivery-focused, customer-facing mindset professional with the ability to be hands-on as well as work at the strategic levels of project delivery.
Digicel have embarked on and is about to complete a complete organizational finance transformation which includes the deployment of WD Financials ERP, Adaptive for FB&A & Consol for Financial Consolidation. Totalling approximately 240 entities globally.

I have been instrumental in the development from the pilot of all 3 work stream strategies and developments.
Workday HCM Workday Finance ERP HRIS

Program Data Migration Lead and Cutover Manager

EIM Philips

Mar 2019 – Jan 2020
Onsite

Wipro – CPQ Aptus/ Sales Force .Com & SAP S4 HANA 
Philips are undertaking a global business transformation throughout all of its value chains business areas and supporting transactional system platforms. The two areas I featured prominently include its Markets 2 Order & Order 2 Cash business transformation projects. This heavily (FDA) regulated environment requires strict documentation requirements and validated processes and procedures against validated environments and systems. EIM (Enterprise Information Management) is the division within Philips that is responsible for delivering these types of IT projects business change and service-driven data management requirements and is spearheading the effort within the Philips business group.
M20
Working as the Program DML and Cutover Manager I managed day to day a team of 12 people, 8 on the EIM Philips side and 4 on the SI side with a mixture of functional and technical expertise. I was responsible for the e2e development and execution of the data migration strategy and plan for all aspects of the program. I have been involved in a wide spectrum of project activities that are not usually considered the normal DML or Cutover activity. however, it allowed me to utilize additional skills giving me greater responsibility. The program foundation release was the North American Markets, which included five business units and my role included a mixture of both hands-on and managerial task
  • Responsible for the delivery if the DMS and DMP
  • Development of the technical ETL landscape
  • Working closely with business stakeholders and process areas leads to defining and capturing data requirements.
  • EIM coordination and project management
  • Lead data design sessions with project and business stakeholders
  • Data strategy delivery  and reporting
  • Development of the integrated Cutover plan
  • Plan, deliver  and execute cutover workshop in North America (Seattle and Boston)
  • Work closely with the various Business, Technical and Data teams to detail their step-by-step activity and timelines.
  • Co-ordination of UAT prep in Seattle. On behalf of EIM
  • Work closely with the wider project team managing solution delivery issues.
  • Management of SI, developments and solution delivery timetable
  • Resource planning across the whole project (Europe and America’s
  • Co-ordination of UAT from Andover (outside Boston) on behalf of EIM
  • Maintain and Develop data Governance processes around Data Migration ETL. MDM, Reporting and EIM BAU 
O2C
  • Global implementation of SAP 4 HANA.
  • Working with SAP ADM and LSMW ETL Technologies.
  • Managing a Small offshore team of developers.
  • Delivering across the Product and Industrial. 
  • Mentoring the less experienced, Wipro team members and others onshore/ offshore. Professionals on the project.
  • Maintain and Develop data Governance processes around Data Migration ETL. MDM. Reporting and EIM BAU.
SAP S/4HANA Salesforce ERP

Data Migration Lead and Cutover

ASOS.com

Jun 2017 – Nov 2017
Onsite

Dynamics 365 Finance Deployment, HR Workday
ASOS PLC is going through a major transformation both within its retail and finance business areas. D365 solution has been rolled out as its Finance 2020 solution and I was the data lead during the deployment. Due to the late nature of the migration, I was responsible for the entire development and execution of the data migration approach, which included the following:
  • Working as part of the Project core/leadership group planning/ executing project deliverables and milestones
  • Development of the data migration strategy
  • Development of the full e2e data migration process
  • Data Mapping workshops, planning & execution
  • Development of MDM processes and data governance model for FI & Ops
  • Oversee ETL developments/ builds for all scoped objects/entities
  • Unit testing and trial migration execution
  • Development of error handling procedures and processes.
  • Manage business data cleansing to legacy
  • Manage 3rd parties’ data cleansing and data delivery
  • Work closely with the business and SME to deliver bespoke and additional data requirements to support Dynamics, third-party systems and legacy systems in to be landscape.
  • Develop and deliver data validation strategy, process and execution across finance business and project teams.
  • Manage overall DM team of three functional DM con and three technical Migration consultants.
  • Develop and deliver data cutover plan (High-level approach and detailed MSP)
  • Multiple legacy and subsystem integrations to consider (old to new master data ID, and COA mapping)
  • Develop the Initial Workday data load to 365 before this integration can be switched on, as part of the Workday go-live.
Workday HCM Microsoft Dynamics 365 ERP HRIS

Data Migration and Cutover Manager

Allegion (France)

May 2016 – Feb 2017
Onsite

AX Dynamics., Workday  deployment
Working as part of the leadership core team in Europe and as part of the deployment group my role consisted of the following;

Data Migration 
  • Overall ownership and delivery of all data migration activity to support the deployment into the France business, covering all e2e business processes including, Manufacturing, Sales data WM, IM, and Finance Procurement.
  • Management of two teams, consisting of Developers and analysts based across a number of locations in France Italy and the US.
  • Development of data migration strategy and detailed migration plan.
  • Planning, development and execution of trial data loads.
  • Development, rollout and execution of data validation and reconciliation process to support AX Go-live
  • Development and execution of a Data Cleansing strategy to support the customer master data load to AX environment
  • Planning, Facilitating and executing data mapping sessions with the business team members.
  • Data issue management to support CRP’s functional and integration testing cycles.
  • Planning and management of business data cleansing teams.
  • Project, Stakeholder reporting, and expectation management.
  • Management of technical SI team members and quality assurance activity.
  • Management of 3rd party suppliers and some project-related vendor deliveries.
  • Development of a Data Governance Model to support both data migration end-to-end and business-as-usual end states.


Cutover
  • Development of an integrated Cutover Plan
  • Plan and lead Cutover workshops with business stakeholders and functional leads and their teams
  • Planning and execution of trial cutover activities with all related resources and personnel.
  • Development and execution of Go-No-Go Criteria to support the pre-cutover decision-making process.
  • Development of Cutover Issue resolution process and team and support team framework
  • Obtained buy-in and managed the relationship of senior business stakeholders of the cutover plan
  • Manage technical teams and the delivery of all technical cutover plans.
  • Work closely with testing teams to agree and deliver testing sign-off criteria ahead of moving into the cutover period and agree on the ramp-up testing scenarios.
  • Manage 3rd parties and service providers as part of the cutover, by integrating and coordinating their activities as part of the cutover delivery.
  • Development of rollback and backup plan with updates to relevant sections of the business continuity plan.
Workday HCM ERP

Reviews

No reviews yet.