Our healthcare products are primarily designed at our facilities in the United States and in the United Kingdom with sustaining engineering efforts in India. These products include enterprise and embedded software, networking, connectivity, mechanical, electronic and software subsystems, most of which are designed by us. We are also currently involved, both in the United States and internationally, in research projects aimed at improving our medical systems and at expanding our current product lines.
We design and manufacture optoelectronic devices and we provide electronics manufacturing services primarily in our facilities in the United States and internationally in the United Kingdom, Canada, Mexico, India, Indonesia, Malaysia and Singapore. We engineer and manufacture subsystems to solve the specific application needs of our OEM customers. In addition, we offer entire subsystem design and manufacturing solutions. We consider our engineering personnel to be an important extension of our core sales and marketing efforts.
In addition to close collaboration with our customers in the design and development of our current products, we maintain an active program for the development and introduction of new products, enhancements and improvements to our existing products, including the implementation of new applications of our technology. We seek to further enhance our research and development program and consider such program to be an important element of our business and operations. As of June 30, 2020, we engaged approximately 488 full-time engineers, technicians and support staff. We intend to continue to invest in our research and development efforts in the future.
Manufacturing and Materials
We currently manufacture our security and inspection systems domestically in California, Colorado, Kentucky, Massachusetts, and Tennessee, and internationally in Malaysia and the United Kingdom. We currently manufacture our patient monitoring and diagnostic cardiology systems in Washington state. Our connected care system is developed in Oklahoma, Washington state, and Edinburgh, United Kingdom. We outsource manufacturing of certain of our supplies and accessories. We currently manufacture our optoelectronic devices and provide electronics manufacturing services domestically in California and New Jersey, and internationally in Canada, Mexico, India, Indonesia, Malaysia, the United Kingdom and Singapore. Most of our high volume, labor intensive manufacturing and assembly activities are performed at our facilities in India, Mexico, Indonesia and Malaysia. Our ability to manufacture products and provide follow-on service from offices located in these regions allows us to remain in close proximity to our customers, which is an important component of our global strategy.
Our global manufacturing organization has expertise in optoelectronic, microelectronic and integrated electronics for industrial and automation, medical, aerospace and defense industry applications. Our manufacturing includes silicon wafer processing and fabrication, optoelectronic device assembly and screening, thin and thick film microelectronic hybrid assemblies, surface mounted and thru-hole printed circuit board electronic assemblies, cable and harness assemblies, box-build manufacturing, and flex circuitry on a complete turnkey basis. To support our manufacturing operations, we outsource certain requirements, including sheet metal fabrication and plastic molding of components.
The principal raw materials and subcomponents used in producing our security and inspection systems consist of X-ray generators, linear accelerators, radioactive isotopes, detectors, data acquisition and computer systems, conveyance systems and miscellaneous mechanical and electrical components. A large portion of the optoelectronic devices, subsystems and circuit card assemblies used in our inspection and detection systems are manufactured in-house. The majority of our X-ray generators, linear accelerators, radioactive isotopes and conveyance systems used in our cargo and vehicle inspection systems are purchased from unaffiliated third party providers.
The principal raw materials and subcomponents used in producing our healthcare products consist of printed circuit boards, housings, mechanical assemblies, pneumatic devices, touch screens, medical grade displays, cables, filters, textiles, fabric, gauges, fittings, tubing and packaging materials. We purchase finished medical devices, computers, peripheral accessories, and remote displays from unaffiliated third party providers.