On Assignment, Inc. provides short- and long-term placement of contract, contract-to-hire, and direct hire professionals in the United States, Europe, Canada, Australia, and New Zealand. The company operates in four segments: Apex, Oxford, Physician, and Life Sciences Europe. The Apex segment offers mission-critical information technology (IT) and scientific staffing professionals for contract, contract-to-hire, and permanent placement positions to Fortune 1000 and mid-market clients, as well as provides consulting services for other select project-based needs. This segment offers staffing and services support for companies from various industries, including financial services, business services, consumer and industrials, technology, healthcare, government services, and communications. The Oxford segment provides high-end contract and direct placement services of IT and engineering professionals with expertise in specialized IT; software and hardware engineering; and mechanical, electrical, validation, and telecommunications engineering fields. The Physician Segment offers short- and long-term physician staffing; and permanent physician search services and temporary staffing for nurse practitioners, nurse anesthetists, and physicians assistants, as well as offers consulting services. The Life Sciences Europe segment provides contract life science professionals to clients in the biotechnology, pharmaceutical, food and beverage, medical device, personal care, chemical, automotive, educational, and environmental industries. Its contract staffing specialties include chemists, clinical research associates, clinical lab assistants, engineers, biologists, biochemists, microbiologists, molecular biologists, food scientists, regulatory affairs specialists, lab assistants, biostatisticians, drug safety specialists, SAS programmers, medical writers, and other scientific professionals. The company was founded in 1985 and is headquartered in Calabasas, California.