Infrastructure is an indivisible part of our modern life experience. Infrastructure projects are the cornerstone of states' economic growth, development and wellbeing. Nevertheless, it is often unclear what is considered under the term "infrastructure" when thought through. Few scientists explored the term more closely, giving their insights in possible classification of infrastructure projects, most of them adopting division on economic (physical) and social infrastructure. By conducting desk research and focus group research, authors explored new possible approach to infrastructure classification, combining the existing knowledge and three perspectives of sustainable developmenteconomic, social and environmental. The main contribution of this work lies in proposal of sustainable-oriented infrastructure classification. The results of this study may be found useful by researchers, project management practitioners, policymakers and wider interested public in broadening comprehension horizon on infrastructure in general.

Project Management as profession has been rapidly developing in last few decades. That has been followed by many different Certifications developed by different organizations. The aim of research was to explore how Project Management Certificate can influence on Project Managers' career. The qualitative research was made within 35 Project Managers from 15 different countries. Research was conducted using grounded theory method for identification of the major codes that are representing areas where knowledge and skills required for Project Management Certificate can affect a Project Managers' career. The results of conducted research show that there is not the same level of importance of all identified codes and confirm that the Project Management Certification has positive influence on Project Managers' Career.