Provided herein are systems, methods, and compositions for the modification of target DNA sequences. More particularly, systems, methods, and compositions for editing genomic DNA in eukaryotic cells with a CRISPR-associated transposase are provided. Also provided are vectors and vector systems which encode one or more CRISPR-associated transposases, as well as methods for the design and use of such vectors. Also provided are methods for identifying and validating novel CRISPR-associated transposases.