A selection of the companies for whom I have worked:
Copyediting and proofreading books on literature, theology, history, music, law and social sciences.
Proofreading and copyediting mathematics textbooks.
Copyediting advanced mathematics textbooks in LaTeX.
Copyediting educational material on information technology.
Copyediting and proofreading material for mathematics and physics textbooks.
Copyediting mathematics textbooks; proofreading subtitles for video material.
Copyediting books on philosophy, mathematics and science.
Copyediting advanced economics textbooks.
Copyediting of papers written in LaTeX for SAGE scientific journals covering areas such as robotics, high performance computing, and mathematics.
Copyediting mathematics and research methods textbooks.