But My SME Wrote It
Although it seems logical that anything your subject matter expert (SME) creates and is willing to contribute towards your course development is free of any copyright concerns, this isn't necessarily so. There are certain guidelines that will govern your use of material created by a SME.
Work Made for Hire
If your SME would like to reuse material that they created within the scope of other employment, you will need to investigate that situation further prior to utilizing it. It could fall under what the Copyright Act calls a "work made for hire" and would be protected by copyright.
A “work made for hire” is—
(1) a work prepared by an employee within the scope of his or her employment; or
(2) a work specially ordered or commissioned for use as a contribution to a collective work, as a part of a motion picture or other audiovisual work, as a translation, as a supplementary work, as a compilation, as an instructional text, as a test, as answer material for a test, or as an atlas, if the parties expressly agree in a written instrument signed by them that the work shall be considered a work made for hire. For the purpose of the foregoing sentence, a “supplementary work” is a work prepared for publication as a secondary adjunct to a work by another author for the purpose of introducing, concluding, illustrating, explaining, revising, commenting upon, or assisting in the use of the other work, such as forewords, afterwords, pictorial illustrations, maps, charts, tables, editorial notes, musical arrangements, answer material for tests, bibliographies, appendixes, and indexes, and an “instructional text” is a literary, pictorial, or graphic work prepared for publication and with the purpose of use in systematic instructional activities.
Take special note of the categories involving instructional text and test material. This is the very content that you will likely want to reuse in your course development.
It is important to ask the SME about the contractual conditions under which they created the material. Their contract should stipulate whether their previous employer owns the rights to any materials your SME created while under contract. If the SME indicates that they are legally allowed to reuse this material, make sure to document this information along with the course locations of the content in case it should ever come under question.