Global Business Services Center

About Us

We are a growing team of 900+ young professionals providing end to end business services globally to the youngest division of Atos – Unified Communications and Collaboration, as well as to all other divisions and the vast majority of Atos Regional Business Units. Starting as a Financial Shared Services Center 5 years ago supporting Unify, a Siemens company, we are now a multifunctional Global Business Services Center, supporting more than 15 interlocking business support functions, capitalizing on synergies, enhancing efficiency and developing a critical pool of knowledge and expertise. Being the first company certified as a Great Place to Work in Bulgaria we are raising the bar as an employer by providing unmatched opportunities for professional development and career advancement. Join us to share our Success!

Global Bussines Center Services at a Glance

2014 – GBSC opening

2016 – GBSC of the Year

2019 – Great Place to Work Certified

2020 – Great Place to Work Certified

Service coverage – 33 entities in 25+countries in 8 languages

FUEL for emerging Leaders program success story with Atos wide implementation

ISO 9001: 2015 Certified

ISO 14001:2015 Certified

ISO 27001: 2013 Certified

Supporting 15+ Business Functions and 1000+ processes by providing high added value end to end service to group companies: Accounting, Controlling, Treasury & Credit Management, HR Shared Services, Supply Chain, Order to Cash, Sales Operations, Rainbow, Pre-Sales, Cloud Support, Competitive & Market Intelligence, IT Global Service Desk, Process Excellence, Quality Management, Master Data, Etc

Great Place To Work Certificate


For three years in a row, the Global Business Services Center in Sofia has been certified by the Great Place to Work Institute.

The Great Place to Work® certification is a ‘Gold Standard’ and the most definitive ‘Employer-of-Choice’ and Workplace quality recognition that any organization can receive. Business practices show organizations that create a great workplace culture for their employees also perform better.

Why we are great place to work?


„Our human capital is our main asset in which we invest heavily to yield an amazing return in productivity, quality, creativity, employment satisfaction and fast paced global career path opportunities for our top performers. Results are not late, as we have managed to cut attrition in half over the last two years, to create a steady pipeline of work coming to us from the Global Atos Organization“, says Milen Marinov, Head of UCC Nearshoring and GBS, General Manager of Atos IT Solutions and Services Bulgaria.


Milen Marinov

Head of GBSC

Miroslav Boev

HR and Operations Director

Main Functions

Order to Cash – Elena Diamandieva, manager

We are a colorful driven team of O2C ninjas responsible for a set of business processes that involve receiving and fulfilling customer orders and requests for telecom products and services, invoicing, and analyzing the financial aspects of those purchases and driving cash collection to secure company’s cash inflow. We are highly qualified in business communication, we value company culture and our commitment goes beyond and above business-as-usual. But above all, we are good humans.

Accounting & Controlling- Kalin Tomov, manager

The accounting department consists of motivated and open-minded professionals, performing various finance tasks, within three different streams – General Ledger, Accounts Receivable, and Accounts Payable. We are proud to be servicing more than 20 reporting entities in around 10 EU countries + the US. Following the Lifelong Learning concept, many colleagues go for professional qualifications (ACCA/CIMA/CFA students and members) and/or foreign language education (5 EU languages covered within the team) – being actively supported by the company. Always striving to maximize customer satisfaction while at the same time contributing to our employees’ personal and professional development.

Great team of young, experienced, and motivated professionals with expertise in providing a wide range of controlling activities and ad-hoc reporting, serving internal customers from all over the globe. Developing the team is essential to us, we share the challenges and celebrate together. Dynamic and action are pumping through our veins. Striving for continuous improvement and delivering beyond expectations is in our DNA. “Coming together is a beginning. Keeping together is progress. Working together is a success.” – Henry Ford

Supply Chain – Kevi Karageorgieva, manager

The core processes of the Supply Chain organization are concentrated in the Global Business Service Center, providing essential support to the UCC division. The performed tasks help control and reduce costs; allay risks, such as late shipments & logistical errors; improve customer delivery service and communication. The local structure is cooperating actively with significant business towers such as Sales, Procurement, Head Quarter, etc. The established communication chain is ensuring a smooth collaboration between the different departments. As our primary goal remains customer satisfaction, our efforts are being invested in the successful onboarding and accurate training on our team members. The wide area of subject matter experts covers the portfolio and is seeking for process optimization. New projects are delivering the opportunity for additional qualifications and very large networking in the company. The active usage of SAP and additional ERP systems and the development of new tools is guaranteeing technical effectiveness.

Treasury & Credit Control – Irina Madoleva-Iossifova, manager

Treasury teams are dedicated to delivering treasury-related reports for decision-making purposes to top-level ATOS management of different GBUs. Our daily activities include liquidity management (i.e. monitoring of loans and intercompany receivables and payables), cash flow management, and reporting (data consolidation, reconciliation, and group reporting). The teams work in tight cooperation with the Treasury Managers of the local entities and support the business with relevant regular and ad hoc analysis.

Credit Control teams provide end-to-end credit control services in different European languages following the internal ATOS Credit Control policies. Our Credit Control specialists support the local treasury and sales management teams through various direct customer contact techniques and ensure a smooth cash collection process. The Credit Control teams are responsible for providing valuable insight into the expected collection flows and risky items.

Admin & Facility – Daniela Tasheva, manager

The Admin & Facility’s team main objective is to create a beautiful, cozy, and productive office environment for our colleagues. We take care of all administrative requirements, logistics, technical maintenance, security…., and some IT support as well. So, in case you have any issues or ideas regarding your workspace, equipment, or overall environment, you can always reach out to us. And even though we always have our hands full, the Admin team never misses an opportunity to have some fun, in the office or outside.

Global Functions – Etien Yanev, Head of UCC Advocacy Marketing

Our GBSC offers job opportunities in key units with a global scale. We have colleagues working in the corporate communications team, market intelligence, sales operations & HR. We operate in a very dynamic and international environment and take part in strategic decisions globally.


Business Center TZUM

T: +359 2 8141 743
2 Knyaginya Maria Louisa Blvd, TZUM, fl. 4
Sofia 1000, Bulgaria

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