Forvis Mazars is a leader in audit, tax and advisory services, operating worldwide across 100+ countries and territories. Join our 40,000+ strong team to grow your career through general opportunities, diverse projects, and continuous learning. Belong to a supportive environment where your unique perspective is valued and success comes from working together. Impact with your bold ideas and help drive us forward.

As a Back Office Assistant, you will be part of Forvis Mazars Group, based in our Center of Excellence in Barcelona, supporting the smooth running of operations through efficient administrative management, team support, and coordination of internal processes in an international environment.

Your impact Join Forvis Mazars and support our Audit teams across Switzerland from our Barcelona hub. In this role, you will play a key part in the preparation of high-quality proposals and client materials, contributing directly to our business development efforts and helping win new audit engagements.

Your responsibilities

Support the preparation of audit proposals (RFPs), presentations, and client deliverables

Produce high-quality, impactful documents in line with brand and client expectations

Collaborate closely with Audit teams across Switzerland

Manage and update sales opportunities in our CRM system (Salesforce)

Ensure consistency, accuracy, and high attention to detail across all deliverables

Contribute to process improvements and efficiencies in proposal management

Provide structured administrative and coordination support to the Audit business development activities

Your profile

Proven experience in proposal management, business development, marketing, or a similar role ideally within a services industry

Additional experience in business development, account management, project management or marketing would be considered as an asset.





Fluency in English and French (C1 minimum). German (C1) is a plus, both written and spoken

Advanced proficiency in MS Office, particularly PowerPoint, and a strong interest in leveraging digital and AI-enabled tools, including the regular use of Copilot and similar solutions.

Experience with CRM tools (e.g., Salesforce) is a strong advantage

Strong ability to manage priorities and multiple deadlines in a fast-paced environment, with a clear sense of ownership

Stakeholder-oriented, able to understand needs and translate them into pragmatic, value-adding solutions

Detail-oriented and quality-driven, with clear and structured written communication skills

Proactive and organised, able to work independently while contributing effectively to a collaborative, international team

What we offer An international role based in Barcelona, working closely with Swiss Audit teams A dynamic and collaborative environment with direct business impact

Opportunities to take ownership and contribute to strategic initiatives

Learning and development opportunities within a growing international firmFlexible working environment

Working location This position is based in

Barcelona , supporting our

Audit teams across Switzerland .

At Forvis Mazars, diversity and inclusion are an integral part of our culture – they strengthen the way we collaborate, grow, and move forward together. A workplace where everyone can be themselves is the foundation for bold ideas, continuous learning, and meaningful impact.

We are committed to attracting talent that reflects the diversity of our clients and communities – regardless of background, nationality, disability, beliefs, social background, age, sexual orientation, or gender identity. We select candidates solely based on their skills, knowledge, qualifications, and experience.

Belong. Grow. Impact – with your unique perspective.

📌 Administrative Assistant – Business Development - Swiss market (Madrid)
🏢 Forvis Mazars Group
📍 Madrid