International Service Group

On the right path

We support you across the globe – as a full-service provider in all personnel matters!

Guido Leissinger
ISG Founder/CEO






We grow internationally!

Our Mission is

to maximise your success!

Identity, Identification and Motivation!

Welcome to the ISG!

As a leading human resources consulting firm in Europe we gladly offer a portfolio of services covering all personnel matters.

With over 700 employees in 60 offices throughout 35 countries, we are able to connect both people and business answering our clients’ needs as one unified team. Our consultants and sector specialists together cover all areas with the highest level of expert knowledge and experience.

For over 20 years, ISG has been operating internationally and excelling in Human Resources, Executive Search, Training & Development and Media solutions.

About Us!


we believe that an international environment best promotes the potential of our employees.

Hiring & Developing

nothing we do is more important than engaging and promoting people.

Mutual trust

and respect for our partners are the foundations for future cooperation and for the reputation of our company.

Quality of Service

exceeding our customers’ expectations is the focus of our activities!

True values

develop when evolving from the inside out!


We strive for our continuous development and the ongoing improvement of our services to exceed your expectations!