Coo
CurrentA small consultancy firm with a big offering, passionate about delivering a high-quality service with measurable results
Jan 2020 - Present
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Denis O'Sullivan Email & Phone Number
COO at Umbreco
at
Umbreco
1 work email found
@dposullivan.co.uk
LinkedIn matched
✓ Verified Jul 2026
4 data sources
Profile completeness 100%
Who is Denis O'Sullivan? Overview
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Quick answer
Denis O'Sullivan is listed as COO at Umbreco at Umbreco, based in Ashill, England, United Kingdom. AeroLeads shows a work email signal at dposullivan.co.uk and a matched LinkedIn profile for Denis O'Sullivan.
Denis O'Sullivan previously worked as COO at Umbreco and Managing Director at Acorn Change Management Limited. Denis O'Sullivan holds Bsc Hons, Accountancy from University Of East Anglia.
Company email context
Email format at Umbreco
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{first}@dposullivan.co.uk
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Profile bio
About Denis O'Sullivan
MEET DENIS > COO at UMBRECO, an accomplished transformation and change professional with over 15 years’ experience working in the Financial and Insurance industry.WHY WORK WITH ME > UMBRECO Ltd is a specialist delivery partner providing change and transformation services to the finance and insurance sector. Being an independent consultancy firm, we are not tied to any commercial enterprises or alliances. This means that we are able to provide an affordable, specialist service that is tailored to meet the individual needs of you and your business.What’s more, as UMBRECO meets the small company criteria, our clients will be able to retain contractors on their projects even once the IR35/Off Payroll reforms come into force in 2021.WHO I WORK WITH > Direct reports into C-Level business stakeholders (including Partners, Directors, Chief Information & Operating Officers and Chief Architects), SME and Business stakeholdersCONTACT ME > Email denis.osullivan@umbreco.co.uk, or call 0783 469 4665SPECIALITIES > Project/Programme consultancy & delivery, Target Operating Model definition, Business Process Outsourcing (BPO), System Implementation, Delivery Governance implementation
Listed skills include Pmo, Governance, Stakeholder Management, Project Delivery, and 40 others.
Current workplace
Denis O'Sullivan's current company
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14 roles
Denis O'Sullivan work experience
A career timeline built from the work history available for this profile.
Managing Director
Current
Sep 2016 - Present
Programme Manager
Oct 2019 - Jun 2020
Finance Transformation Programme Manager
• BPO shared service function established in Noida with Towergate’s offshore partner Accenture• Microsoft Dynamics 365 deployed as the group general ledger system, including Power BI• Automation of journal posting from Business Policy Administration Systems into the GL• Integrated auto-reconciliation tool and process automation (robotics) for a critical business process• Deployed Employee Expenses and Procure to Pay (P2P) system to 4000 users
Sep 2016 - Jun 2019
Pmo Lead, Global It Division
• Established new governance framework and control procedures, creating a single view of project activity across the organisation, covering reporting, planning, resource capacity/utilisation, financial control and pipeline demand management• Led the procurement process for acquiring a Project Portfolio Management (PPM) and managed the implementation of Planview across the globe• Implemented passport system that drove earlier engagement between projects, Group IT and the wider business, routinely assessing the ongoing viability of project investments and ensuring smoother transition of projects into operations
Jul 2013 - Sep 2016
Programme Manager
UKGI IT Transformation Programme• Programme mobilisation, including resourcing and recruitment• Creation of governance, processes and forums• IT Cost Transparency & Benchmarking• Business Unit Demand Reduction• Application Decommissioning/Modernisation
Sep 2012 - Jun 2013
Head Of Portfolio Management (Pmo)
Portfolio Management for AVIVA GI, including;• Construction of the Change Investment Portfolio• Established the UKGI Change Investment Executive Committee• Definition, baseline and tracking of the investment portfolio• Assessment of technical "do-ability" and creation of the overall change schedule• Reporting of the Change Portfolio progress and/or risk escalation to the Executive/Board
Jun 2010 - Sep 2012
Senior Programme Office Manager
• A global operations transformation 2-year programme across the UK and India• Accountable for ensuring appropriate governance in place across the programme, including status reporting, risk management, change control and gating processes• Financial controller of the programme business case, including management of the £150m programme budget and the £90m (annualised) benefit realisation plan• Liaison between Deloitte programme management team and the Aviva GI IT & Change
Jan 2008 - Jun 2010
Project Manager
• Motor Claims web-based application development• Led construction of the RFI and RFP evaluation processes• This included prominent global consultancy firms, including IBM and Deloitte
Aug 2007 - Dec 2007
Project Manager
• Web-based repair scheduling and tracking application development• Full end-to-end project life-cycle delivery responsibility• Software House engagement and 3rd party hosting provider• Negotiation of software development contracts and support agreements
Oct 2006 - Jul 2007
Programme Office Manager
• Pensions Simplification - Stay Legal Programme (PSSL)• A programme to support new A-day pension legislation requirements• Incorporating change over 24 IT systems with a development budget of circa. £20m • Established appropriate programme governance and assurance
Jan 2006 - Aug 2006
Apr 2004 - Jan 2006
Apr 2001 - Mar 2004
Finance Analyst
Jun 1996 - Apr 2001
1 education record
Denis O'Sullivan education
FAQ
Frequently asked questions about Denis O'Sullivan
Quick answers generated from the profile data available on this page.
What company does Denis O'Sullivan work for?
Denis O'Sullivan works for Umbreco.
What is Denis O'Sullivan's role at Umbreco?
Denis O'Sullivan is listed as COO at Umbreco at Umbreco.
What is Denis O'Sullivan's email address?
AeroLeads has found 1 work email signal at @dposullivan.co.uk for Denis O'Sullivan at Umbreco.
Where is Denis O'Sullivan based?
Denis O'Sullivan is based in Ashill, England, United Kingdom while working with Umbreco.
What companies has Denis O'Sullivan worked for?
Denis O'Sullivan has worked for Umbreco, Acorn Change Management Limited, Thomsons Online Benefits, Towergate Insurance, and Willis Towers Watson.
How can I contact Denis O'Sullivan?
You can use AeroLeads to view verified contact signals for Denis O'Sullivan at Umbreco, including work email, phone, and LinkedIn data when available.
What schools did Denis O'Sullivan attend?
Denis O'Sullivan holds Bsc Hons, Accountancy from University Of East Anglia.
What skills is Denis O'Sullivan known for?
Denis O'Sullivan is listed with skills including Pmo, Governance, Stakeholder Management, Project Delivery, Project Portfolio Management, Program Management, Change Management, and Business Transformation.
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