Contrôleur de gestion (H/F)

Job Description

InstaGroup is a nationally recognised leader in energy efficiency and renewable solutions, known for our technical expertise and high-quality installations. Since 1980, we have delivered innovative, cost-effective solutions that improve building performance, reduce energy costs, and lower carbon emissions - giving our customers peace of mind.

Our services span insulation, solar energy, and heating solutions, supported by a comprehensive product offering. We are committed to sustainability, with over 80% of the materials we use sourced from recycled or sustainable origins.

Our Mission

Our mission is to transform the energy sector through innovative, sustainable solutions that exceed customer expectations. Guided by excellence, integrity, and environmental responsibility, we strive to lead energy advancement while making a positive impact on the world and creating a more sustainable future for generations to come.

The Opportunity

We are looking for a pragmatic and detail-oriented Management Accountant to join our finance team on a fixed term basis, supporting our External Contracting division.

This is a highly visible and commercially important role, responsible for producing accurate and insightful management accounts for a project-driven area of the business. The role requires someone comfortable working with complex, assumption-led financial data and able to translate this into meaningful insight.

You will act as a key business partner to operational stakeholders, ensuring financial discipline is maintained while supporting decision-making to help the division deliver against its plan.

What You'll Be Responsible For

Management Reporting & Analysis

• Ownership of the monthly management accounts for the External Contracting division
• Producing accurate, timely and insightful financial reporting with clear commentary
• Managing the detailed allocation of revenue and costs across multiple projects
• Applying judgement to assumption-driven accounting to ensure accurate and consistent outcomes
• Supporting budgeting and forecasting processes for the division

Business Partnering

• Acting as a trusted finance partner to divisional leadership and operational teams
• Providing financial insight to support commercial decision-making
• Challenging assumptions and ensuring financial discipline across projects
• Acting as the "eyes and ears" of finance within the division

Balance Sheet & Control

• Ownership of all balance sheet accounts relating to the division
• Preparing and reviewing detailed monthly reconciliations
• Ensuring integrity, accuracy and completeness of financial records
• Supporting robust financial controls and governance

Systems & Process Improvement

• Driving improvements to existing processes, with a focus on simplification and efficiency
• Supporting the integration between operational systems and finance systems
• Influencing reduced reliance on Excel-based processes through better system utilisation
• Improving the speed and accuracy of reporting outputs

Audit & Wider Finance Support

• Supporting year-end processes and external audit requirements
• Assisting across the finance team during periods of absence or peak workload
• Contributing to continuous improvement initiatives across the wider finance function

What We're Looking For

Experience & Qualifications

• Qualified accountant (ACCA / CIMA or equivalent) or qualified by experience
• Strong management accounting experience, ideally within a project-based or contracting environment
• Experience working with complex cost and revenue allocations
• Proven track record of improving processes and simplifying ways of working
• Experience with finance systems (Microsoft Dynamics NAV desirable)
• Exposure to project-based systems (e.g. Big Change or similar) advantageous

Skills & Capabilities

• Strong analytical skills with attention to detail
• Comfortable working with ambiguity and assumption-driven data
• Ability to balance accuracy with pragmatism to meet deadlines
• Strong Excel skills, alongside a desire to reduce reliance on manual processes
• Excellent communication skills with the ability to influence non-finance stakeholders

Personal Attributes

• Commercially aware with a proactive mindset
• Organised and resilient, able to manage competing priorities
• Curious and improvement-focused
• Confident in challenging and supporting stakeholders constructively

What Success Looks Like

In this role, you will:

• Deliver accurate and timely management accounts for the division
• Provide clear insight into project performance and profitability
• Improve efficiency and reduce manual processes through better systems usage
• Strengthen financial control and balance sheet integrity
• Build strong relationships with operational teams and influence decision-making

Core Behaviours

Lead with Integrity

You demonstrate accuracy, accountability and sound judgement in all financial matters.

Communicate with Impact

You translate complex financial information into clear, actionable insight.

Think Commercially

You understand how financial performance links to operational delivery and outcomes.

Collaborate & Influence

You build strong relationships and work effectively with non-finance stakeholders.

Drive Improvement

You challenge existing processes and continuously seek better ways of working.

Stay Resilient & Organised

You manage deadlines effectively while balancing detail with practical decision-making.

What You'll Get

We recognise the value experienced professionals bring and offer a competitive compensation package aligned to experience, expertise, and impact.

This opportunity is ideally suited to a full-time appointment (37.5 hours per week), however, we are open to considering reduced or part-time hours for the right candidate. We welcome applications from both fixed-term employees and contractors.

Working with us, you'll benefit from:

• A competitive salary or day rate, commensurate with experience and engagement type
• Flexible working arrangements, including reduced hours considered
• The opportunity to make a meaningful impact within a collaborative and growing business
• Up to 6% employer pension contribution (for employed roles)
• Enhanced annual leave entitlement of 25 days plus Bank Holidays (pro rata for part-time employees)
• Health and wellbeing support
• Life and critical illness insurance (for employed roles)
• Free on-site parking and EV charging facilities
• Ongoing learning and professional development support
• Regular staff and company events

We are committed to creating a supportive, flexible, and rewarding environment where people can thrive - professionally and personally - whether joining us on a fixed-term basis or as a contractor.