We're the Occupational Analysis Experts!
At PSTC, we literally wrote the book on the topic of conducting defensible work and job analysis — see the chapter below for a detailed treatment of the topic:

Harvey, R.J. (1991). Job analysis. In M.D. Dunnette & L. Hough, Eds, Handbook of Industrial and Organizational Psychology. Palo Alto: Consulting Psychologists Press.

We also wrote the book in terms of giving you the ability to collect high-quality, defensible job analysis data when we developed the Common-Metric Questionnaire (CMQ). In our view, the CMQ defines the "gold standard" with respect to high-quality job analysis; get full details at the CMQonline.com site.

The CMQ is a web-based questionnaire designed to accurately describe both managerial and non-managerial occupations, and give you the data you need to make a job-relatedness argument if you are required to defend the validity of your employee assessment procedures in an EEO challenge.

Do you miss the DOT? We do.
In the past, did you rely on the now-obsolete Dictionary of Occupational Titles (DOT) to administer your HR programs? We've talked to many former DOT users, and many of them express strong disappointment in the "O*NET" system that was developed to replace the DOT. Former DOT users have voiced particular concerns regarding the O*NET's ability to collect adequately specific data, to provide verifiable data that will withstand legal scrutiny, and to provide raters with accurate, comprehensible rating scales.

If you're upset at the loss of the DOT, and don't feel that the O*NET provides the critical data that you need to run your organization, please give the CMQ a look. We're confident you'll agree that the CMQ provides you with the tools that the O*NET should have provided to HR practitioners when the DOT was discontinued.