Cost Modeller

Position Description

At CGI, you will help shape the cost foundations of complex space and satellite communications programmes that enable secure connectivity, sovereign capability, and national resilience. As a Senior Cost Modeller, you will play a critical role in ensuring major space and satcom initiatives are underpinned by robust, defensible, and data-driven cost models. Working alongside programme, engineering, and finance leaders, you will influence strategic investment decisions across the full lifecycle of high-value programmes. You’ll be trusted to take ownership of complex challenges, encouraged to apply creative thinking to cost insight, and supported by a collaborative environment focused on delivering meaningful outcomes in one of Australia’s most strategic sectors.

Your future duties and responsibilities

In this role, you will lead cost modelling activity across large-scale space and satellite communications programmes, supporting decisions from early concept through delivery and long-term sustainment. You will work closely with project managers, engineers, and finance teams to ensure cost estimates are transparent, evidence-based, and aligned with strategic and operational objectives.

You will also contribute to governance, assurance, and continuous improvement, strengthening how cost insight supports affordability, risk management, and successful programme outcomes in highly regulated environments.

Key responsibilities:

Develop & Model: Build and maintain complex cost models across the full programme lifecycle.

Analyse & Advise: Perform scenario analysis, sensitivity testing, and cost-driver assessments.

Forecast & Control: Monitor cost performance, update forecasts, and support cost control actions.

Engage & Influence: Present cost insights to senior stakeholders, justifying assumptions and methodologies.

Assure & Govern: Ensure cost models meet internal, industry, and audit standards with clear documentation.

Required Qualifications To Be Successful In This Role ~Proven experience in cost modelling, cost estimating, and financial analysis for complex programmes, projects, or portfolios.

~Strong understanding of cost estimation methodologies, including parametric, analogous, bottom-up, and lifecycle costing techniques.

~Experience developing and maintaining complex cost models using tools such as Microsoft Excel, Power BI, Python, or specialist cost-estimating software.

~Ability to perform scenario analysis, sensitivity analysis, risk modelling, and cost-driver assessments to support decision-making.

~Knowledge of programme controls, including forecasting, budgeting, earned value management (EVM), cost performance monitoring, and variance analysis.

~Strong analytical and problem-solving skills with the ability to interpret large datasets and translate findings into actionable insights.

~Experience working within highly regulated, government, defence, aerospace, space, telecommunications, or critical infrastructure environments.

~Ability to communicate complex cost assumptions, methodologies, and recommendations to senior stakeholders and non-financial audiences.

~Understanding of governance, assurance, audit requirements, and cost model documentation standards.

~Excellent stakeholder management skills with experience collaborating across engineering, project management, finance, procurement, and commercial teams.

~Strong written and verbal communication skills, including the preparation of reports, business cases, and executive-level presentations.

~Experience supporting investment appraisal, business case development, affordability assessments, and strategic planning activities.

~Australian Government security clearance eligibility (or ability to obtain and maintain clearance), where required.

Together, as owners, let’s turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.