I have to deal with a similar guy. He reports directly to the COO and is considered an expert in his field.

If I wrote his code in my former job, my boss would have asked me, if I'm having problems at home.

Countless variables named tmp, i, j, k, x, value, etc., atrocious error handling (Java, he does no null chess, but simply wrap everything in a try/catch nullpointer block), and tons of spelling mistakes.

Oh and tests are evil.