Mariusz Niedzielski "MAR-TEL"

71.12.B - Engineering activities and related technical consultancy

33.14.Z - Repair and maintenance of electrical devices

33.20.Z - Installation of industrial machinery, equipment, and devices

42.22.Z - Works related to the construction of telecommunications and electrical lines

43.13.Z - Performing excavations and geological-engineering drilling

43.21.Z - Installation of electrical systems

62.20.B - IT consulting and IT equipment management activities

70.20.Z - Business and management consultancy activities

74.99.Z - All other professional, scientific and technical activities, not elsewhere classified

80.09.Z - Other security activities, not elsewhere classified

85.51.Z - Non-school forms of sports education and recreational and sports activities

85.59.B - Courses and training for acquiring knowledge, skills, and professional qualifications in non-school forms

85.59.D - Other non-school forms of education, not classified elsewhere

93.19.Z - Sports activities, not elsewhere classified

95.10.Z - Repair and maintenance of computers and telecommunications equipment