International Mobility Senior Specialist
Sofia, BG
About Bull
Bull is a story. One with a century of European innovation and a working environment where experts design powerful, sustainable, and sovereign digital solutions, enabling states and industries to retain full control over their data and their AI.
Bull is also thousands of engineers, researchers and passionate tech people shaping the future of high‑performance computing, AI, and quantum technologies.
Every day, our teams push the boundaries of what is technologically possible – from next‑generation HPC architectures to exascale supercomputers – supported by world‑class R&D, more than 1,600 patents, and unique end‑to‑end capabilities spanning hardware design, software engineering, data science and quantum research.
We are a people‑centric, innovation‑driven company, where collaboration spans Europe, the Americas and India. We share a common vision of a responsible and sustainable innovation that delivers concrete impact for our customers.
Role Overview
We are looking for a International Mobility Senior Specialist to manage end-to-end global mobility processes, supporting international assignments across Bull SAS globally.
The role operates across strategic, operational, and administrative levels, combining policy design with hands-on execution. You will act as the go-to expert for global mobility topics, ensuring compliance, efficiency, and a strong employee experience.
Key Responsibilities:
International Assignment Management
Manage end-to-end international assignments, including transfers, international hires, and localization. Ensure accurate data is maintained in mobility systems, support reporting and audits, and ensure full compliance with immigration, tax, and legal requirements across all cases.
Policy Implementation
Develop and maintain global mobility policies, ensuring alignment with internal guidelines and local regulations. Monitor regulatory changes, adjust processes accordingly, and support cost projections and compliance frameworks while clearly communicating policies and benefits to employees.
Vendor Coordination
Work closely with external vendors, including immigration, relocation, tax, and legal providers, ensuring smooth service delivery. Oversee vendor processes, track services and payments, and continuously monitor and optimize performance and costs.
Employee Support
Act as the main point of contact for employees on international assignments, providing guidance on relocation, immigration, and benefits. Support employees and their families throughout the full assignment lifecycle to ensure a smooth experience.
Compliance & Reporting
Stay up to date with changes in immigration and tax regulations and ensure accurate tracking of mobility data and compliance status in internal systems.
Cross-functional Collaboration
Collaborate with HR Business Partners, Talent Acquisition, Finance, Payroll, Legal, and other stakeholders to ensure a coordinated and effective approach to international mobility.
Risk Management
Identify and mitigate risks related to international mobility and escalate issues when needed.
Requirements:
- Bachelor’s degree with 3–5 years of experience in International / Global Mobility
- Proven experience managing end-to-end international assignments and mobility processes
- Good understanding of mobility tools and systems (e.g. SharePoint)
- Experience working with external vendors (immigration, relocation, tax)
Key Skills
- Solid understanding of global immigration laws, tax implications, and compliance frameworks across multiple jurisdictions
- Strong communication and stakeholder management skills, with the ability to effectively interact with employees, managers, and external partners
- Ability to manage multiple assignments simultaneously in a fast-paced environment, including complex international relocation cases
- Solution-oriented mindset with strong problem-solving capabilities
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Nice to have: Basic understanding of written French.
What We Offer
- A dynamic and international working environment.
- Exposure to end‑to‑end order and financial flows within a global organization.
- Opportunities for professional growth, specialization, and internal mobility.
- A collaborative, supportive team culture.
Join us!
Here, your ideas, your curiosity and your technical excellence directly shape the next era of advanced computing - unlocking enterprise value, accelerating scientific progress and driving positive impact for society.