Shield

The design process was started by creating 3 overlapping circular grid.
Generally speaking, the grid can help you to produce a huge amount of logo variations.
Grid was created from ellipse and modified with blend tool to create circular steps inward. Overlapping sections were then merged by shape builder tool. At the end, variation was applied, such as edge (smooth/sharp) and fill/outline.
This "Shield" logo conveys a message that it is a professional & reliable brand. The logo which is maze-alike shape depicts trustworthy protection.