1. Lecturer: 1995-2001.
2. Lecturer (Senior Scale):2001-2006.
3. Lecturer (Selection Grade): 2006.
4. AssistantProfessor (Selection Grade): 2006-2009.
5. Associate Professor: 2009 onwards.

1. A UGC sponsored Minor Research Project entitled, ‘Application of Ridge Regression: A Biased Estimation Procedure- A Useful Alternative to OLS’, is completed during 1998-2000 as the Principal Investigator.
2. A UGC sponsored Major Research Project entitled, ‘Impact of Microfinance through Self-Help Group on Empowering Women of Sivasagar District: An Integrated Quantitative Approach’, is completed during 2011-2013 as the Principal Investigator.

1. Ranjana Gogoi, C.K. Chetia (1997): A Resume of Ridge Regression: A Biased Estimation Procedure; Souvenir of National Seminar on Advancing Frontiers in Statistics and Operations Research; Dibrugarh University.
2. Ranjana Gogoi (2004): OLS and Some selected Ridge Regressions with Lower Mean Square Error: Applications to Non-Orthogonal Data; Proceedings of the National Seminar on Recent Developments in Statistical Methods and Operations Research; Department of Statistics, Dibrugarh University.
3. Ranjana Gogoi (2008): Biodiversity: Exploitation, Conservation and Management; Souvenir of UGC National Seminar on, ‘Recent Trends in Biodiversity: Exploitation, Conservation and Management’, Gargaon College.
4. Ranjana Gogoi (2009): Empowering Women: A Statistical Perspectives; Sandhyayee -A Collection of Research based Articles; Gargaon College.
5. Ranjana Gogoi, N. Tamuli (2013): Generalized Linear Regression Model of Female Participation in SHG’s; International Journal of Statistics and Analysis; Vol 3, Number 3(2013); ISSN 2248-9959.

Chief Editor of “Open Science- A Compilation of Science Article” carrying ISBN: 978-81-937874-6-5, published by Gargaon College Science Forum in 2019.

Workshop/Seminar organized as Coordinator:

• Week long National Level Online Training Programme on C-Programming Language in collaboration with NEILIT during 24^thJune-29^thJune,2021, commemorating 15^th National Statistics Day on 29^th June,2021.
• State Level Webinar on ‘Statistics and Data Analysis’ on the occasion of 14^th National Statistics Day, 29^th June, 2020.
• Motivational and Interaction Programme on Statistics and Mathematics, held on 4^th April, 2018.
• UGC sponsored National Seminar on- Contemporary Issues of Mathematics and Statistics’, held on 22-23 March,2013.
• UGC sponsored National Level ‘Instructional Workshop on Quantitative Techniques and Software Applications in Research Methodology’, held in 18-19 June, 2011.

1. Professional Qualifications:

1. Green Belt Certification on Six Sigma Methodology from SQC & OR Unit, ISI, Bangalore.
2. SPSS Certification by SPSS South Asia, held at Dibrugarh University.
3. Training & Certification on SPSS at ICSSR-NERC.

      2. Student Projects Supervised [2021 only]:

1. ‘Exploratory Data Analysis of Performances of Batsmen of IPL Series (2011- 2020)’, by Debasish Buragohain, 2021.
2. ‘A Regression Approach on Students’ Perception Towards Online Learning During COVID 19 Pandemic’, by Sanjuma Gogoi, 2021.
3. ‘Mental Health Implications During COVID-19 Pandemic: A Logistic Regression Approach’, Niranjan Yadav, 2021.
4. ‘Statistical Significance of Impact of the COVID-19 Pandemic on Socio- Economic Conditions of Adult Population-A Cross-Sectional Study’, by Juga Pratim Mohan, 2021.
5. ‘Statistical Significance of Implementation of Government Schemes among Beneficiaries of Rural Assam: A Chi Square Approach’, by Dibakar Kataky,2021.
6. ‘Consistency of Batting Performances of Batsmen of ICC World Test Championship’, by Ankit Sahu, 2021.

     3. Any other information:

• Ex Member, Board of Under Graduate Studies (CBCS), Department of Statistics, Dibrugarh University.
• Ex Member, Board of Under Graduate Studies (Semester System), Department of Statistics, Dibrugarh University during 2010-2013.
• Ex Member, Board of Post Graduate Studies Department of Statistics, Dibrugarh University.
• Member, Board of Under Graduate Studies (CBCS), Department of Statistics, J.B. College (Autonomous), Jorhat, Assam since 2015 till date.
• Ex Member, Governing Body, Sapekhati College, Charaideo, Assam as Hon’ble VC of DU nominee w.e.f. January,2017.
• Interim President, Governing Body, Sapekhati College, Charaideo, Assam as per DHE order from 2017-January,2020.
• Member, Governing Body, SPP College, Namti, Assam as Hon’ble VC of DU nominee w.e.f. January,2020.
• Ex Member, Dibrugarh University Court, Dibrugarh University for the period 2012-2020.
• Ex Member, Vidyalaya Management Committee, Kendriya Vidyalaya, ONGC, Nazira for the period of 2011-2017.
• Life Member, Assam Statistical Review.
• Life Member, Assam Science Society.
• Life Member, Cryptology Research Society of India
• Life Member, Indian Econometric Society.

     4. Visiting Faculty of any Institution: Visiting Faculty of Post Graduate Classes (Commerce) of Sibsagar Commerce College, Sivasagarduring 2016.