1978-1980 – Clinical resident of the Department of Pediatrics of the Grodno State Medical Institute.

1980-1983 – postgraduate student of the Department of Pediatrics of the GrGMI. 

1983-1995 – assistant of the Department of Pediatrics of the GrGMI.

1995-1999 – associate professor of the Department of Pediatrics at the Medical Faculty of the GrGMI.

1999-2004 – Head of the Department of Pediatrics No. 1 of the Educational Institution "GrSMU".

2004-2006 – Dean of the Pediatric Faculty of the Educational Institution "GrSMU".

From 2006 to the present – Head of the 2nd Department of Children's Diseases of the Educational Institution "GrSMU".

• Pediatrician of the highest qualification category (1992)

• Candidate of Medical Sciences («Secretory function of the stomach and lactose hydrolysis in combination of acute bronchopulmonary pathology with chronic diseases of the digestive tract in children», 1985)

• Doctor of Medical Sciences («Autoimmune reactions in an ecologically unfavorable environment», 2009) 

• Professor Paramonova N.S. organized and directs the Scientific School of Pediatrics of the Grodno State Medical University. The results of the school's scientific research are known and used in clinics in Belarus and Russia. Publications based on the results of scientific research have been published in scientific publications in Belarus and abroad (Russia, Kazakhstan, Bulgaria, Poland, France). The school's developments made it possible to introduce new methods of examination and treatment of children into the practice of healthcare, achieve high functional results and reduce the duration of treatment.

• Nella Sergeevna and her staff actively make presentations at national and international scientific conferences and congresses.

• Paramonova N.S. constantly improves her professional level. She has repeatedly completed internships at BelMAPO, the Children's Health Center in Warsaw, the endocrinology department of the children's clinic in Zurich (Switzerland), the best children's clinics in Moscow and St. Petersburg.

• He is the author of 482 scientific papers, including 3 monographs, 103 teaching materials and textbooks, including 1 textbook with the stamp of the Ministry of Education of the Republic of Belarus in English, 11 textbooks with the stamp of the Ministry of Education of the Republic of Belarus, 12 with the stamp of the Ministry of Education of the Republic of Belarus. The author of 24 innovation proposals, 4 patents, 6 instructions for use. Member of the Scientific and Technical Council of the Republican Scientific and Practical Center "Mother and Child", the Expert Council of the Ministry of Health of the Republic of Belarus on immunization. Chairman of the Dissertation Defense Council D 03.17.03. Member of the editorial board of three scientific journals. Member of the European Respiratory Society, member of the Union of Pediatricians of Russia, Russian Society of Nutritionists and Nutritionists. For many years, she was the chairman of the Grodno regional branch of the Belarusian Green Cross public environmental organization. Grodno regional branch of the public association "Belarusian Committee "Children of Chernobyl".  Currently, she is a member of the Belarusian Professional Union of Healthcare Workers, the Red Cross, the Znanie Society, the Belarusian Society of Pediatricians, the Belarusian Association of Doctors, and the Belarusian Union of Women.

• N.S. Paramonova directs the training of clinical residents from Grodno and Brest regions, including foreign ones. He continues to actively engage in scientific research. Under her leadership, 7 PhD theses have been defended, she directs the scientific work of 5 more applicants, as well as the scientific work of students. The works performed under her leadership have repeatedly received diplomas at the republican competition, and in 2014 and in 2023, the works were awarded the title of laureate of the Republican Student Works Competition.

• Advises children in the departments of the Grodno Regional Children's Clinical Hospital and polyclinics of the city and region, gives lectures and prepares methodological materials for pediatricians.

• She was awarded the Diploma of the Ministry of Health of the Republic of Belarus (1999, 2006), the badge "Excellent Health Worker of the Republic of Belarus" (2001), the Prize of the Foundation of the President of the Republic of Belarus for the training of talented youth (2016), the Francysk Skaryna Medal (2017), the medal "Best Mentor" (2019).