Colonial Staffing Group Inc. | 5,143 followers on LinkedIn. CSG is a full service engineering and technology staffing firm available to support your temporary and direct hire needs | CSG is a privately owned full service engineering and technology staffing firm immediately available to support your temp, temp to hire and permanent hire needs. CSG offers a full life cycle recruiting model specifically tailored to staffing designers, engineers and technical professionals nationwide. CSG has the connections, experience and expertise to save you time and money.