Board of Directors

Tim Warner

Managing Director (Certus is an Accenture Company)

Tim is one of the leading Oracle Cloud (Fusion) applications implementation and training consultants in the UK and mainland Europe.

An industry and Oracle Corporation recognised specialist in the Oracle HCM family of products. Tim uses his in depth knowledge of the Oracle product set to maximise the benefits of the application through configuration rather than customisation.
Since 1998, Tim has provided consultancy services either as Project Manager or Lead Consultant level on many of the largest Oracle HCM implementations in the UK and Europe.

Tim is currently co-owner and chairman of Certus Solutions.

Tim has over 20 year experience with Oracle applications.
Tim is currently (2006 - *) the chairman of the UKOUG HCM SIG and a member of the Oracle HCM Users Group (OHUG) in the USA.
In 2008, Tim was made an ‘Oracle ACE’ by Oracle Corporation in recognition of his strong credentials in the Oracle HCM market and for his contribution to the Oracle community.

He has been instrumental in setting up Certus Solutions Oracle Fusion Practice and has been involved in delivering Oracle Fusion Applications training on behalf of Oracle University to over 1,000+ Oracle partners, customers and Oracle themselves.
He has also been instrumental in working closely with Oracle Centre of Excellence in the UK for Oracle Fusion Applications ensuring that Oracle themselves can provide the best support for their clients moving forward in the world of Software as a Service.
In 2006, Tim joined the H.M. Prison Service ‘Phoenix HR’ project in the capacities of Lead Consultant and Solutions Architect. This project delivered Oracle HCM to an employee base of over 50,000 within a shared services environment.

Tim has worked on many global implementation projects and is a frequent contributor and presenter to Oracle User Groups around the world.

  • Oracle ACE
  • MIoD (Member of the Institute of Directors)
  • FRSA (Fellow of the Royal Society of Arts and Commerce)
  • Chairman UKOUG (UK Oracle User Group) HCM SIG (HR Special Interest Group)

Mark Sweeny

Managing Director (Certus is an Accenture Company)

Mark is the Chief Executive of Certus Solutions and is an award winning industry recognised specialist in the delivery of large scale change management programmes. His knowledge and breadth of skills has enabled him to provide counsel and direction to the boards of two international software houses; a change management consultancy; central government departments (Cabinet Office, Ministry of Justice, National Offender Management Services, HMPS, Home Office, Civil Service HR, DEFRA, Office for National Statistics, HM Treasury) and overseen the start-up of two businesses. Equally renowned for his business development activities with over £35m professional services engagements closed and delivered over a 30 year career.

In 2007 having successfully delivered the Phoenix HR Shared Services Programme for HM Prison Service Mark created Certus Solutions and by 2011 had identified the wider market opportunity of "Cloud Computing". Mark subsequently positioned the company as the first UK only leading and dedicated specialist service provider of Oracle ERP & HCM and Talent Acquisition (Taleo) Cloud based enabled business transformation programmes through its engage® service delivery and ongoing support services model.

Today Certus is an Oracle Platinum Partner holding specialisations in ERP, HCM and Taleo Cloud, with a global presence and offices in UK, Australia and India.

Mark is a Fellow and Certified IT Professional of the British Computing Society (FBCS CITP) and holds and First Class Honours degree in Business Studies from Westminster University and a MBA from the Strathclyde Graduate Business School.

Rob English

Chief Operating Officer & Head of Oracle CoE

With over 20 years of experience, Rob specialises in managing and delivering transformational technology solutions, with a primary focus on driving business improvement through the use of Oracle Cloud technology and process improvement, while serving as a trusted advisor to the leadership teams at his clients.

During his career, Rob has advised numerous companies across a variety of industries, including Telecoms & Media, Manufacturing, Central Government, Retail, Transport and Financial Services.

Rob is currently responsible for Certus’ Support and Offshore businesses and enabling customers to maximise ROI from Oracle Cloud services.

Rob spent four years at Hitachi Consulting between 2009 to 2013 where he was promoted to Vice President and joined the Global Leadership Team with responsibility for sales and delivery across their Oracle HCM client base.
Rob is well-known for his time at Edenbrook Solutions which he joined at its inception in 2001 to create an Oracle HCM consulting capability to rival the big-4 system integrators. Rob enjoyed a hugely successful time at Edenbrook winning multi-million pound projects across the UK and EMEA regions, which culminated in the acquisition by Hitachi Consulting in 2009.

Rob started his Consulting career at Oracle in 1996 delivering HCM projects for customers such as BT, Norwich Union, Legal & General, and British Energy.

Between 2004 and 2008, Rob was Chair of the UK Oracle User Group for HCM and delivered several thought leadership presentations within the Oracle and HR community. Rob has written white papers, articles for magazines and hosted industry speaking events and forums for HR leaders in the UK.

Rob is currently a Charity Trustee and Company Secretary at Pinewood Gymnastics Club in Wokingham, Berkshire.

James Ham

Chief Financial Officer

James is a Chief Financial Officer (CFO), with ten years’ public sector experience and proven skills in leadership, strategic financial management and commercial negotiation. He has managed annual budgets in excess of £300m and understands the importance of financial rigor alongside the flexibility to adapt to changing business circumstances the ability to deliver business solutions.

James has amassed a wealth of experience in negotiating, procuring and managing contracts with values over £100m and delivering outcomes to time cost and quality. He is also experienced in the use of insourcing and outsourcing solutions to take advantage of emerging capabilities, bridge skills gaps and increase the efficiency of service delivery.

James was responsible for the first procurement of Oracle Cloud ERP and HCM in a central government department and was the Project Director overseeing its implementation and the Department’s transition to a fully integrated cloud ERP solution.

Ian Carline

Executive Vice President - Industry Solutions

Ian has over 20 years’ experience of Oracle applications, specifically Human Resources Applications, specialising in solution architecture and integration.

Ian has performed a lead design authority role on some of the world’s largest and prestigious implementation. He was the design authority for the project that delivered the NHS ESR solution, which currently produces 2 million pay slips per month in a shared service centre environment. He was also the design authority for the UK MoD tri-service payroll solution, and spent three years at Network rail as the Strategic HCM and Payroll solution architect.

He is also an accomplished trainer, and has delivered Cloud applications; HCM, Compensation and Talent management classes across the world. He has been involved with HCM projects around the world, including USA, Germany, Netherlands, South Africa, Thailand and Switzerland.

Directed and responsible for the design and development Certus Government Cloud solution used for the ONS and HM Treasury

Directed and managed the design of Certus PaaS application
Solution Architect, Dyson Ltd. Overall solution architect for a 25 country rollout of Oracle Cloud HCM incorporating HCM, Compensation, Performance & Talent, Time & Labor, Benefits and Learning

A Solution Architect for Lavendon Group: Designed Fusion HCM to payroll interfaces. a global solution which required 5 local payroll interfaces to multiple payroll providers;

A Lead Compensation Cloud Consultant who led the detailed design of Cloud Compensation at both Schroders Investment Bank and for Kering in France.

  • Nottingham University, BSc Computer Science

Mary Thethi

Executive Vice President - QA and Test Management

Mary is one of the UK’s leading experts in software systems testing and Quality Assurance, with over 20 years’ management experience.

She has helped numerous companies deliver mission critical programmes to the highest possible quality, whilst ensuring the cost of quality is always measured and in-line with customer expectations. Her proven track record includes two global insurance companies (Lombard, Gan Insurance); three international software houses (The HUON Corporation Ltd, The Innovation Group Plc, Rubicon Corporation Ltd); and to the UK public sector (National Offender Management Services; HM Prison Service).

Mary is currently responsible for Certus’ Testing Management Services.

She has used her wealth of experience to develop a number of standard testing and QA methodologies incorporating speed of delivery; repeatable processes; enhanced defect identification and resolution; and detailed reporting metrics.

Mary is often cited and is regularly called upon by leading organisations in advisory and training capacity in regard to software testing.

She was one of the original and longest serving members of the award winning HM Prison Service Shared Services Phoenix Programme, where she was Head of Quality Assurance from October 2004 – October 2008 and oversaw the delivery of QA Services to Finance; Procurement; Training and HR Shared Services project streams. As a consequence she has a wealth of knowledge of the deployment of ERP systems (Oracle E-Business Suite R11.5.10 and R12.1.3) into a Shared Services operational environment.

  • Mary is ISEB qualified.

Management Team

Ryan Jackson

Vice President - Oracle ERP Cloud

Ryan is an executive with a distinguished career in delivery of complex ERP programs across the globe in both public and private sectors. He has worked for over 18 years in consulting delivery roles specialising predominately in Oracle technologies.

He specialises in building and managing high performing teams that ensure programme engagement and customer success.

At Certus, Ryan delivered the first fully integrated HCM and ERP Cloud programme into Central Government. He now oversees the delivery of all engagements in the public sectors.

Professional experience summarised:

  • A career specialising in the implementation of ERP projects across HCM, Finance and Supply Chain
  • Programme Management at National Trust for finance and procurement transformation
  • Programme Management at Ricoh Europe
  • Programme Management at Fellow Europe
  • European Practice Manager for delivery team at Rolta


Debra Lilley

Vice President - Certus Cloud Services & Global Alliance Director

Debra has over 20 years' experience working with Oracle applications and specialises in Financials, Business Intelligence and end to end training.

As well as her own blog, Debra has also written articles for publication in Oracle Scene, Oracle Profit and Oracle One magazines. She shares her insights through presentations at user events worldwide. Debra is also a frequent guest author for Oracle and other blogs.

She is an Oracle ACE director which is in recognition of her strong credentials in the Oracle Cloud applications arena and for her contribution to the Oracle community.

She is currently responsible for the relationship between Certus and Oracle, development, strategy and product management. Debra shares this knowledge internally, with our clients and the wider Oracle community.

Peter Jenkins

Sales & Marketing Director

Peter is a veteran Sales & Marketing specialist with over 20 years’ experience with Oracle and their ever changing product portfolio. He joined PeopleSoft in 1994 when it was setting up its European operation. During his time there, he became Sales Director and was part of a dramatic growth with licence revenues growing to $50 million per annum. Global deals he managed included HSBC, PWC, Standard Chartered Bank, RBS, Daimler, Nomura and Willis.

Peter’s role at Certus, is the development of the commercial side of the company by closely working with Oracle. This primarily involves providing Oracle with details of Certus’s leading Cloud implementation programs as well as our Cloud engage services.

  • Peter has over 30 years’ experience in sales and marketing;
  • Peter spent 10 years with a leading Unix based ERP software vendor, Multi-soft. This included two years setting up the operation in Australia as well as time spent in South Africa and the Far East. The company was sold to Sage.
  • In 2000, Peter was one of the founders of New Gen Corporation, which aimed at working alongside investment companies who wanted expertise in their software company clients.
  • He provided CEO, VP Sales and turnaround roles for a variety of clients. Since inception, he has been closely involved with the growth of many companies and the sales of over 10 companies.

Julian Ford

Vice President - Oracle Business Support

Julian has spent his career in the development, implementation and support of Oracle Applications.

Joining the prestigious graduate developer programme in 1998; developing the world’s first integrated suite of enterprise applications for Oracle in Reading.

Julian moved in to customer focused projects with Oracle Consulting, as lead Payroll consultant on the world’s largest single payroll at DWP.  After working on over 21 HCM business change projects for large enterprise and public sector clients for Oracle – Julian moved to the partner community and has now worked for ten years to grow independent Oracle specialists.  With commercial understanding of building professional service companies and senior management experience across multiple territories.  Julian now heads the Certus Global Support team.