Community Staffing Resources is a member of the Delta Personnel Services family. CSR adds to the rich history that Per Diem Staffing and Guardian Security bring to the Northern California staffing industry by providing staff to residential and commercial property management companies, as well as office administrators. Our management team brings decades of experience in both staffing and property management to the table, ensuring a good fit for employers and staff alike. Guardian Security Agency is a division of Delta Personnel Services, Inc., a trusted California human resource management and personnel staffing source for over 30 years. Delta brings the same quality service of staffing and supervision that Guardian Security Agency is known for to CSR, integrating their expertise and professionalism in the security field with perfect-fit property staffing services. Property Management Staffing — Activity Meeting in Concord, CA Founded June 17, 1996, Per Diem Staffing Systems, Inc. serves Northern California Respiratory Therapy Departments with leading temporary help services. Pulmonary Technicians Services (PTS) had been in business since 1983, and in 1996 merged with Medical Professional Services. The new entity was named Per Diem Staffing Systems, Inc., the first California-based staffing company to receive Joint Commission Certification.