A Scientific Officer at MoEFCC assists in formulating environmental policies, reviewing Environmental Impact Assessment (EIA) reports submitted under the EIA Notification 2006, and evaluating applications from industries requiring prior environmental clearance. They coordinate with CPCB, State PCBs, and expert appraisal committees on technical matters. Scientific Officers also contribute to India's international environmental obligations, including commitments under CBD, UNFCCC, and the Basel, Rotterdam, and Stockholm conventions.

The exam tests Environmental Science (pollution monitoring, climate change, biodiversity, ecosystem services), Ecology and Biodiversity (forest types, wildlife legislation, protected area network), General Studies (current affairs, environmental law including the Environment Protection Act 1986, Water Act 1974, Air Act 1981, and EIA Notification 2006), and Reasoning & Aptitude. Candidates are expected to have a thorough understanding of India's National Action Plan on Climate Change (NAPCC) and its eight missions.

Some MoEFCC Scientific Officer posts are filled through direct recruitment conducted by the ministry itself, while certain senior or specialized positions may be notified through the Union Public Service Commission (UPSC). When routed through UPSC, the selection involves a written examination followed by a personality test/interview. Candidates should check the official MoEFCC and UPSC websites for specific notification details, as the mode of recruitment can vary by post level and vacancy.

The EIA Notification 2006 is extremely important as it is the primary regulatory tool that MoEFCC uses to grant environmental clearances. The notification mandates prior EIA for 39 categories of projects (Schedule I projects) and categorizes them into Category A (appraised at central level by MoEFCC) and Category B (appraised at state level by SEACs). Understanding the stages of EIA — screening, scoping, baseline data collection, impact prediction, public hearing, and environmental management plan — is essential. Questions on the roles of Expert Appraisal Committee (EAC) and State Expert Appraisal Committee (SEAC) are common.

Begin with a deep study of environmental science fundamentals — ecology, biogeochemical cycles, climate change science, and biodiversity conservation. Then systematically cover all major environmental laws including the Environment Protection Act 1986, Water Act 1974, Air Act 1981, Forest Conservation Act 1980, Wildlife Protection Act 1972, and EIA Notification 2006. Follow this with current affairs related to MoEFCC's recent notifications, new wildlife sanctuaries, and India's climate commitments. Solve previous year CPCB, Forest Service, and UPSC environmental science papers as MoEFCC does not publish many papers independently.