OneStream Technical Manager (FTC 18 months)

Grosvenor; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading international organization in Greater London seeks an experienced OneStream Technical Manager to facilitate the transition from Cognos Controller to OneStream for finance processes. You will support the Finance Project Manager by providing operational support and testing during the implementation phase. Key skills include strong people engagement, analytical capabilities, and proficiency in OneStream. The role supports a hybrid work approach, emphasizing flexibility and inclusion.

Qualifications

• Experience in end-to-end OneStream implementation, including integrations.
• Proven expertise in upgrade processes and lifecycle management.
• Ability to liaise with implementation partners and provide operational support.

Responsibilities

• Support Finance Project Manager on delivery and transition activities.
• Attend OneStream status meetings and provide input.
• Conduct functional testing and support during UAT.

Skills

People engagement and management

Presentation skills

Empathy

Analytical mindset

Problem-solving capabilities

Tools

OneStream

Data modelling

Cube View / Dashboard reporting

Job description

We think this is a special place to work. So, before we get into the detail of this job opportunity, here's a few words about who we are and what's important to us.

Grosvenor is an international organisation whose activities span urban property, food & agtech, rural estate management and support for philanthropic initiatives. We're united by a common goal to deliver lasting commercial, social and environmental benefit.

We're steeped in history but focused on the future

We may have 340 years of history, but we are firmly focused on the future. From progressive environmental action to being at the forefront of community engagement, we work with purpose and embrace change. So diversity of thought and fresh perspectives really matter to us. We want our people to bring everything they are to work. Their life experiences, their knowledge, their unique take on challenges and solutions.

What's it like to work here?

Well, there is plenty to talk about. It's purposeful, whether that's innovative ways to tackle the climate crisis or engaging meaningfully with local communities. It's commercial and ambitious, which you'll see in our transformational development projects and diverse investment pipeline. It's sociable, in our buzzing café and at our many events. It's challenging, varied and supportive : contributing to inclusion and innovation is part of everyone's personal goals here. We also enjoy a flexible work environment and, because it's a family business, we like to think we are a little less corporate too.

Interested? Then take a look at the job details below. We're looking for someone who wants to build a brilliant career at Grosvenor and we look forward to receiving your application.

We have an exciting opportunity to be part of the transformational Fusion programme, where you can play a key part in making it a success and changing the way we work for the future. Through the programme you will have the chance to learn and develop and make a real difference.

You would be joining an experienced team of professionals from both within and external to Grosvenor who all bring extensive experience of delivery for this type of transformation programme.

Purpose of Role

The role of the OneStream Technical Manager will be to support the Finance Project Manager, Finance Centre Team and GPA Finance Team on all aspects of delivery and support activity to transition from Cognos Controller to OneStream for actuals reporting, group consolidation, budgeting, forecasting and cash flow.

It is anticipated that the project will conclude post hypercare following the completion of the budgeting cycle in October / November 2026 for the FY 2027.

This role will focus on operational support for OneStream during the implementation and optimisation in the first year of operations through to the end of Quarter 1 in 2027 and will at that time be reviewed for extension and / or transition into ongoing operational support and optimisation on as part of the support solution.

The role reports into the FUSION Finance Project Manager on day-to-day activities, with line management being provided by the FUSION Project Director.

This is a critical role in supporting Grosvenor to provide :

OneStream knowledge and experience into the FUSION project team during implementation.

Hypercare and operational support to both GPUK Finance Centre and GPA (US) Finance Team. Design and delivery of optimisations post go-live (working alongside and liaising with Inlumi our implementation partner)) Testing support during cycles of UAT and to pre-test solutions prior to UAT Support for all preparatory work for the go-lives for Actuals Consolidation, Planning & Budgeting and Cash Flow.

Key Requirements

• Attend OneStream status meetings providing input and advice to support the Finance Project Manager in their discussions with business stakeholders and implementation partner.
• Support the completion of a workstream status report weekly for submission to the FUSION PMO, support engagement with the FUSION PM to discuss workstream status and attend the Programme Board.
• Undertake functional testing of solution components delivered by the implementation partner prior to UAT conducted by the business.
• Support business stakeholder queries during UAT and to co‑locate with business users during UAT to provide live support.
• Operational technical support to business users post go‑live during hypercare and to work with the GPUK Finance Centre Team and GPA teams on required optimisation as part of the overall support solution working alongside and with the Grosvenor Application Support team.
• Provide input and support the development and creation of administration processes for the ongoing support and change management for the OneStream solution.
• To liaise with Inlumi on project delivery, location, hypercare requirements and support to business users.

Key Skills

Strong people engagement and management skills are essential, along with effective presentation skills, empathy, and a genuine desire to help colleagues thrive in their roles.

This position offers a unique opportunity to lead and influence key business initiatives, enabling you to further develop your leadership, communication, and stakeholder management skills as you drive successful outcomes and support others in achieving their objectives.

Technical Skills

• Proven experience in end-to-end OneStream implementation, including integrations, data modelling, master data management, and advanced Cube View / Dashboard reporting.
• Expertise in OneStream upgrade processes and lifecycle management.
• Ability to scope, design, and deliver OneStream projects, ensuring effective stakeholder engagement and partner coordination.
• Strong understanding of Finance, Data, and Systems integration (preferred but not essential).
• Proficiency in MDM analysis and ensuring system usability post-implementation.
• Skilled in building and maintaining Cube Views and related structures.
• Experience in delivering system enhancements, user training, and driving continuous improvement initiatives.

Other Key Skills

• Exceptional communication and stakeholder influencing abilities.
• Strong attention to detail while maintaining focus on broader strategic objectives.
• Analytical mindset with investigative and problem‑solving capabilities.
• Collaborative team player with a proactive approach.
• Familiarity with Real Estate business operations preferred
• Must demonstrate a proactive approach to learning and show willingness to take on challenging tasks with confidence and adaptability.
• Ability to work to agreed milestones and deadlines.
• Skilled at bridging finance and technical teams effectively.
• Solid accounting knowledge (preferred).
• Demonstrated adaptability and capability to "fill gaps" in projects and assume varied roles as needed.

We know flexibility is important and take a hybrid approach to working, please contact us for further details.

Grosvenor is proud to be a Disability Confident Committed employer. If you would like to speak with us for more detail, please contact [e-mail]

We want you to have every opportunity to show us your strengths. There are adjustments available for our process, please contact us on [e-mail] to discuss.

To apply for this job please click on "Apply".

To begin your application you will be asked to create an account.

Please carefully read our Recruitment Privacy Notice before proceeding with an application. The privacy notice sets out how Grosvenor obtains, uses and protects the personal information which you provide to us. You can read the notice here - https : / / www.grosvenor.com / legal / recruitment-privacy-notice