This major group comprises professional occupations in natural sciences; professional occupations in applied sciences and professional occupations in engineering. These occupations come with Training, Education, Experience and Responsibility (TEER) identified as TEER 1. Occupations classified in TEER 1, as those in this group with a 1 as the second digit of their code, typically require a university degree (bachelor's, master's or doctorate) or the accumulation of several years of experience and expertise in the subject matter knowledge in a related occupation found in TEER 2, when applicable (which includes occupations with a 2 as a second digit in their code).