For GS-0401 BASIC EDUCATION REQUIREMENT: Applicants must meet A or B below to satisfy the basic education requirement for Biologist, all grade levels. A. Degree in biological sciences, agriculture, natural resource management, chemistry, or related disciplines appropriate to the position. *OR* B. Combination of education and experience--courses equivalent to a major, as shown in A above (24 semester hours or the equivalent in biological sciences, agriculture, natural resource management, chemistry, or related disciplines appropriate to the position), plus appropriate experience and/or additional education for a total of 4 years. The education or combined education and experience must be comparable in type, scope and thoroughness to that acquired through successful completion of a 4-year course of study as described in "A" above. For GS-1315 BASIC EDUCATION REQUIREMENT: Applicants must meet A or B below to satisfy the basic education requirement for Hydrologist, all grade levels. A. Successful completion of a full 4-year course of study in an accredited college or university leading to a bachelor's or higher degree in physical or natural science, or engineering that included at least 30 semester hours or the equivalent in any combination of courses in hydrology, the physical sciences, geophysics, chemistry, engineering science, soils, mathematics, aquatic biology, atmospheric science, meteorology, geology, oceanography, or the management or conservation of water resources. The course work must have included at least 6 semester hours or the equivalent in calculus (including both differential and integral calculus), and at least 6 semester hours or the equivalent in physics. **OR B. A combination of education and experience-course work as shown in "A" above (30 semester hours or the equivalent in any combination of courses as specified in "A" above which must include at least 6 semester hours or the equivalent in calculus (including both differential and integral calculus), and at least 6 semester hours or the equivalent in physics), plus appropriate experience and/or additional education for a total of 4 years. The education or combined education and experience must be comparable in type, scope and thoroughness to that acquired through successful completion of a 4-year course of study as described in "A" above. For GS-1350 BASIC EDUCATION REQUIREMENT: Applicants must meet A or B below to satisfy the basic education requirement for Geologist, all grade levels. A. Successful completion of a full 4-year course of study in an accredited college or university leading to a bachelor's or higher degree in geology. In addition to the geology course work included in the degree, it must also have included or been supplemented by 20 additional semester hours in any combination of mathematics, physics, chemistry, biological science, structural, chemical, civil, mining or petroleum engineering, computer science, planetary geology, comparative planetology, geophysics, meteorology, hydrology, oceanography, physical geography, marine geology, and cartography. **OR B. A combination of education and experience-course work as shown in "A" above (24 semester hours or the equivalent in geology plus 20 additional semester hours or the equivalent in any combination of courses as specified in "A" above), plus appropriate experience and/or additional education for a total of 4 years. The education or combined education and experience must be comparable in type, scope and thoroughness to that acquired through successful completion of a 4-year course of study as described in "A" above. For GS-1370 BASIC EDUCATION REQUIREMENT: Applicants must meet A or B below to satisfy the basic education requirement for Cartographer, all grade levels. A. Degree: cartography; or a major that included or was supplemented by at least 30 semester hours in cartography and/or directly related science, and related mathematics. Such course work includes, but is not limited to, cartography, astronomy, geodesy, photogrammetry, physical and geological oceanography, computer science, land surveying, geophysics, physical geography, and remote sensing. The 30 semester hours must have included at least 6, but no more than 15, semester hours of college level, non-business mathematics or statistics (i.e. college-level algebra, trigonometry, calculus, or scientific mathematics or statistics requiring equivalent college-level courses as prerequisites). **OR B. Combination of education and experience-courses equivalent to a major in cartography, or a minor that included or was supplemented by at least 30 semester hours in cartography, and/or directly related science, and related mathematics, as shown in "A" above, plus appropriate experience and/or additional education for a total of 4 years. The education or combined education and experience must be comparable in type, scope and thoroughness to that acquired through successful completion of a 4-year course of study as described in "A" above. For GS-14: In addition to the basic education requirement as stated above, applicants must have one year of appropriate professional experience in hydrology that is equivalent to at least the GS-13 level in the Federal service. Examples of such experience could include serving as a senior expert involved in biological, hydrologic, geology and cartography work for which technical problem definitions, methods and/or data were highly incomplete, controversial, or uncertain and whose evaluations and recommendations were accepted by others as those of a technical expert in hydrology. At this level, Scientists typically represent an authoritative source of consultation for other scientists and program specialists, are called upon to resolve issues that significantly affect programs, make long range and controversial proposals and defend their findings and recommendations in public or high level forums. You must meet all qualification and eligibility requirements for the position by the closing date of the announcement.