Along with Chester L. Krause, Mishler created the "Krause-Mishler" numbering system used in the Standard Catalog of World Coins.

[6] In 1976, he wrote Coins: Questions and Answers with co-author Carl Allenbaugh, which has subsequently been re-issued several times.

Mishler was influential in the sale of Carson City Morgan dollars from the GSA hoard, and served on the United States Assay Commission in 1973.

[7] During his term, from September 2009[8] until August 2011,[9] he wrote the "From Your President" column in the Association's journal, The Numismatist.

[10] These columns focus on Mishler's experiences in the hobby community, including attendance at coin shows and conventions, club meetings, and his other responsibilities.

Mishler spearheaded the effort to create the Chester L. Krause Legacy Park in Iola, Wisconsin, which opened in October 2023.