Karl Kjer possesses considerable expertise in such areas of study as transcriptomes, phylogenomics, systematics, macroinvertebrate surveys, insect ecology and taxonomy, DNA barcoding, deep insect phylogeny, aquatic ecosystems, aquatic biomonitoring, rRNA structure and homology. A talented, knowledgeable freelance science writer/editor, Kjer utilizes this expertise to produce high-quality, scholarly and engaging science content for a variety of clients. He has worked as a freelance writer since early 2017.