In 2010, HRO Today Magazine named CDI-Talent Management, along with its alliance associate, WorldConcert, to its "Project/On-Demand Leaders" list of top recruitment process outsourcing (RPO) firms.

In 2011, CDI Corp. ranked #43 on the Staffing Industry Analysts list of Largest Global Staffing Firms, #5 on their list of Largest Global Engineering Staffing Firms, #11 on their list of Largest US IT Staffing Firms and #21 on their list of Largest US Staffing Firms.  In 2009, CDI was recognized as having the longest customer tenure in the Managed Staffing space.

In 2010, Forbes.com named CDI Corp. as one of the Most Trustworthy Companies in the United States. CDI ranked #2 on the list of small-cap firms for consistent accuracy in financial reporting and corporate governance. This is the fourth year in a row that CDI has been ranked in the top ten on the list, which is compiled by an independent financial analytics company.

In 2011, CDI Corp. was listed on the InformationWeek 500 list for the 11th consecutive year. The InformationWeek 500 list identifies the nation's most innovative users of information technology and spotlights the power of innovation in information technology, rather than simply identifying the biggest IT spenders.

CDI Engineering Solutions consistently appears on the annual "Top 500 Design Firms" list published by ENR which ranks the largest engineering, architectural and environmental design firms by revenue.  In 2011, CDI's rankings were as follows: Top 500 Design Firms #28 / Top 100 Pure Designers #12 / Top 50 Designers in International Markets #27 / Top 20 Manufacturing #7 / Top 20 Industrial Process/Petro #17.