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Senior Consultant Financial Performance & Business Controller

Sia Open
Hybrid Brussels Full-time Senior Accounting

At a glance

Senior Accounting role at Sia. Brussels · full-time.

Pay not stated Accounting salary

RoleAccounting
SenioritySenior
LocationBrussels
WorkplaceHybrid
EmploymentFull-time
PostedOct 13, 2026
Role brief

financeroles summary, based on the employer's posting.

What you'll do

  • Redesign clients’ finance functions and establish stronger financial and business oversight
  • Help clients trace the financial effects of business processes and regain control of them
  • Improve closing and consolidation, while making planning, budgeting and forecasting work better and faster
  • Shape the finance offer and support commercial work by clarifying client needs

What you bring

  • A master’s degree in applied economics, engineering, computer science, statistics, econometrics or another listed field
  • Three to six years in a consulting firm, plus knowledge of financial strategy, reporting and finance-process improvement
  • You speak French, Dutch and English, and are ready to build expertise in data and AI topics

Who this fits

This senior consulting role suits someone analytical, rigorous and collaborative who can turn findings into clear conclusions and deliver results. You’ll work in Brussels in a hybrid arrangement and may take temporary assignments abroad, including in France or the Netherlands. A work permit cannot be provided.

From the employer

Sia is a next-generation, global management consulting group. Founded in 1999, we were born digital. Today our strategy and management capabilities are augmented by data science, enhanced by creativity and driven by responsibility. We’re optimists for change and we help clients initiate, navigate and benefit from transformation. We believe optimism is a force multiplier, helping clients to mitigate downside and maximize opportunity. With expertise across a broad range of sectors and services, our 3,000 consultants serve clients worldwide from 48 locations in 19 countries. Our expertise delivers results. Our optimism transforms outcomes.

Sia is looking for bright and dynamic Senior consultants committed to building relationships and delivering results. We are interested in people with good track records during their education and with a first successful and relevant job experience. We believe in people we hire, so we encourage you to take up responsibility as fast as possible. Your personal growth is our goal.

You will be involved in different projects and you will mainly work on the following topics:

  • Rethink the Finance Organisation of our clients

  • Build the foundations for strong business and financial Controllership;

  • (Re)gain control over the financial impact of their business processes;

  • Improve and accelerate their closing, consolidation, but also the effectiveness and efficiency of plans, budgets, and forecasts…

You will get the opportunity to actively contribute to Sia’s internal activities:

  • Development and reinforcement of our offer, by understanding and interpreting Financial performance and strategy

  • Business development, by contributing to need definition and participating in our commercial initiatives

Equipped with the entrepreneurial fibre, you are ready to collaborate with us in a fast growing company.

In return, you can expect:

  • An international company that gives importance to diversity, inclusion, employee well-being and corporate social responsibilities actions.

  • A great working atmosphere with friendly and professional colleagues where innovation and entrepreneurship are encouraged 

  • A personal development plan with a regular follow-up as well training opportunities to develop yourself

  • A competitive salary with great advantages, like mobility budget, hospital insurance, performance -related bonus,...

  • Master degree in applied economics/engineering/computer science/statistics/econometrics

  • 3 to 6 years’ experience within a consultancy firm

  • Knowledge in financial strategy, closing, consolidation & reporting and in finance process optimization

  • Outstanding team player and good communication skills

  • Analytical mind, exploring options and able to synthesize into conclusions

  • You have a strong interest in data and AI-related topics, the ability to quickly build expertise in these areas, and you’re excited about helping our clients seize the opportunities they offer.

  • Autonomous, dynamic, result oriented, rigorous and committed.

  • Language skills: French, Dutch and English

  • Prepared to participate in temporary assignments abroad (e.g. France, The Netherlands)

We are unable to provide a work permit for this position

Sia is an equal opportunity employer. All aspects of employment, including hiring, promotion, remuneration, or discipline, are based solely on performance, competence, conduct, or business needs. 

Sia is an equal opportunity employer. All aspects of employment, including hiring, promotion, remuneration, or discipline, are based solely on performance, competence, conduct, or business needs.

Opportunity

Accounting work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Accounting

Find me work

By the team behind financeroles.

Find me work
Opportunity

Accounting work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Find me work

By the team behind financeroles.