S.D. Codified Laws § 36-18A-3
For the purposes of this chapter, the term, practice of engineering, means the practice or offering to practice of any service or creative work, the adequate performance of which requires engineering education, training, and experience in the application of special knowledge of the mathematical, physical, and engineering sciences to such services or creative work. Such service or work includes consultation; investigation; evaluation; planning; design; and design coordination of engineering works and systems; planning the use of land and water; land-use studies; teaching of advanced engineering design subjects; performing engineering studies; and the review or observation of construction for the purpose to determine whether the work is in general accordance with drawings, specifications, and other technical submissions. Any such service or work, either public or private, may be in connection with any utilities, structures, buildings, machines, equipment, processes, work systems, projects, and industrial or consumer products, or equipment of a mechanical, electrical, hydraulic, pneumatic, or thermal nature, insofar as they involve safeguarding life, health, or property, and including such other professional services as are necessary to the planning, progress, and completion of any engineering services.
For the purposes of this section, the term, design coordination, includes the review and coordination of those technical submissions prepared by others, including consulting engineers, architects, landscape architects, land surveyors, and other professionals working under the direction of the engineer. The term, engineering studies, includes all activities required to support the sound conception, planning, design, construction, maintenance, and operation of engineered projects, but excludes the surveying of real property for the establishment of land boundaries, rights-of-way, easement exhibits relating to land boundaries, and the dependent or independent surveys or resurveys of the public land survey system.
A person is construed to practice or offer to practice engineering if the person practices any branch of the profession of engineering, if the person, by verbal claim, sign, advertisement, letterhead, card, or in any other way represents himself or herself to be a professional engineer, or if the person through the use of some other title implies that the person is a professional engineer or that the person is licensed under these provisions, or if the person holds himself or herself out as able to perform or does perform any engineering service or work or any other service designated by the practitioner which is recognized as engineering.
SDCL 36-18A-3