Join MST Holding and develop your professional career with us!
At MST Holding, an international business group specializing in Business Process Services, Consulting and Multichannel Contact Center services, we are looking to recruit a Service Administrative Assistant to provide support with administrative management, project monitoring and the coordination of operational processes for an internal company service.
We are looking for an organized, proactive and analytical individual with advanced Excel skills and a good level of English, who wants to be part of a stable project with opportunities for professional development.
What will your responsibilities be?
Monitor projects from an administrative perspective, ensuring compliance with established deadlines.
Manage and oversee invoicing processes, including the issuing, tracking and filing of invoices.
Monitor and follow up on outstanding payments.
Prepare and administratively manage payments in accordance with internal procedures.
Review and manage notifications from public authorities.
Provide support with basic accounting tasks and record updates.
Prepare reports, summaries and administrative documentation to monitor activities.
Manage and organize documentation, ensuring the proper flow of information between departments.
Use advanced Microsoft Office tools, particularly Excel, for data analysis and monitoring.
Contribute to process improvement and automation through digital tools and Artificial Intelligence (AI).
Minimum Requirements
Intermediate or Advanced Vocational Training in Administration and Management, Commerce or a related field, or equivalent professional experience.
B2 level of English,



with the ability to communicate both verbally and in writing.
Advanced proficiency in Microsoft Excel and good command of Microsoft Office.
Strong organizational and planning skills, with attention to detail.
Analytical, proactive and solution-oriented approach, with the ability to work effectively as part of a team.
Ability to manage information and follow administrative procedures.
Desirable Requirements
Experience in administrative tasks related to invoicing, collections, payments or accounting.
Experience preparing reports and analyzing data.
Knowledge of automation tools and Artificial Intelligence.
Experience working in corporate environments or service companies.
Ability to adapt to new digital tools and processes.
What do we offer?
Contract: Permanent.
Working hours: Full-time, 39 hours per week.
Schedule: Split shift, Monday to Friday.
Work arrangement: 100% on-site.
Salary: In accordance with the applicable collective bargaining agreement and corresponding professional category, plus a language allowance.
Ongoing training in digital tools, administrative management and new technologies.
Opportunities for professional development and career advancement.
The opportunity to join a stable project within an international business group.
A dynamic, collaborative working environment focused on continuous improvement.
Why work with us?
At MST Holding, we are committed to the talent, training and professional development of our employees.
If you enjoy administrative management, like working with data, are good at organizing processes and want to continue developing your skills in English, Excel and new technologies, this could be the opportunity for you!
Apply now and become part of our team!

📌 Service Administrative Assistant –English and Advanced Excel (Barcelona)
🏢 MST HOLDING
📍 Barcelona