bbijjiw - they tend to sub-contract to specialist firms or individuals for the occupational psychology elements of a project. They do employ people who have previously qualified as psychologists, but in a more general management/org strategy consulting role.anon - the market for occupational psychology consulting is very fragmented as it's a specialised field with high barriers to entry - there aren't the economies of scale in the projects that you find in large-scale SI engagements for example. As a result, the best practices and (and best-paid) practitioners are generally found in small firms (or as independent contractors associated to a number of firms). Within the field of occ. psychology, these smaller firms will offer more experience (less time relatively spent on unrelated projects) and so accelerate your progression as an expert. Since the market is biased towards small, niche, firms, there is no disadvantage to having these types of firms on your CV (rather the opposite - having a large firm on your CV may make recruiters in this field unconvinced of how much relevant work you did there). In summary, the niche firms are a better option in this space for professional progression; salaries can be better (but it's difficult to compare apples with apples since contractors and small firms often choose that model specifically so that they can work part-time).