CS Yonetim was established in Istanbul, Turkey since 2011 by his founder Cagatay Altunsoy; Since then, CS Yonetim has been recognized as a high-level boutique BPO Company, supporting the multinational companies in their operations in the region and world-wide on a continuous, custom-fit basis. Along the years has grown up successfully together with it’s clients, the company’s main aim to provide high quality consultancy services in the administration, management, taxation, legal and commercial fields both for small and medium-sized companies as well as to individuals or self-employed.

We share our key factors:

  • Trusted personal relationships;
  • Continuous professional learning and updating;
  • Fully professional services integration (accounting, tax, payrolls, legal, business consulting and etc.).

After a long experience with different professionals, we can provide both domestic and international realities reliable integrated services.

If you may need more information or if you prefer to meet us personally for a preliminary advice and get a quotation regarding any of our services, please browse the Contact Us section, you will be contacted as soon as possible.


Real Estate


Over two generations, our company has forged a reputation and a positioning based on open-mindedness and technical excellence.

We seek to understand your business and your concerns, to anticipate your needs, to help you with your strategic thinking, your management and your future development.

All our employees share this ambition, namely to use their skills and know-how to work for the success of your projects.

In a constantly changing economic environment, our company has succeeded in permanently adapting its team so as to be able to meet just as effectively and with the same excitement, the needs of our clients.

We are therefore able to offer the solutions best adapted to the issues facing each type of business.

The issues businesses face, accounting, legal, employment or tax-related, are often complex and can be very diverse depending on the type of activity. Our role is to facilitate the day-to-day running of your business by placing our specialists at your disposal, under the responsibility of our specialists who will manage and coordinate our multidisciplinary service offering.

High-quality work conducted with objectivity and professionalism forms the basis of our commitment to our clients and is the driving force behind our development, guaranteeing in professional ethics, transparency and confidentiality at all times.

Cagatay Altunsoy

Industrial Engineer / B.B.A. / Intern CPA / CS Yonetim Founder



At CS Yonetim, diversity is an integral part of our history, culture, and identity. Inclusion is the way we treat and perceive all differences. We want to create an inclusive culture where all forms of diversity are seen as real value for the company.


Respect for our customers, who are spending their hard-earned monies with us. Respect for our staff, who entrust their working life and career aspirations to us. Respect for our suppliers and partners, who commit to business relationships with us. The challenge, of course, is balancing the expectations of all the above.


As our business evolves to meet global challenges, so does our culture – and transparency is integral to this. For us, transparency means being honest about what we do, how we do it and the challenges we face. We are open to challenge, to discussion and to improving how we work to reflect our values.


We are committed to performance with integrity. Doing what is right for our clients must be at the heart of every decision we make. In doing so, we demonstrate integrity in action, at every level, every day.