Question: A Physical Security Professional (PSP) is a Board certification process for individuals involved in the physical security of organizations, this certification process is offered by which professional organization for security professionals, headquartered in Alexandria, Virginia?

Context paragraphs:
Physical Security Interoperability Alliance: The Physical Security Interoperability Alliance (PSIA) is a global consortium of more than 65 physical security manufacturers and systems integrators focused on promoting interoperability of IP-enabled security devices and systems across the physical security ecosystem as well as enterprise and building automation systems.

National Board of Legal Specialty Certification: The National Board of Legal Specialty Certification (NBLSC) is a non-profit board certification organization in the United States which administers four national board certification programs for attorneys in Civil Trial Law, Criminal Trial Law, Family Trial Law, and Social Security Disability Law.  To become board-certified, an attorney must meet substantial professional requirements and undergo a peer review process.  There are currently more than 2,400 attorneys who are certified by the NBLSC.  The organization is led by board of directors of noted trial lawyers, law professors, and judges.

Physical Security Professional: A Physical Security Professional (PSP) is a Board certification process for individuals involved in the physical security of organizations.  This certification process is offered by ASIS International.  Certification lasts for three years, during which time ASIS requires credential holders to complete 60 "Continuing Professional Education" credits in order to meet recertification standards.

Associated Locksmiths of America: ALOA Security Professionals Association (ALOA, formerly known as the Associated Locksmiths of America) is an American trade organization for locksmiths and other physical security professionals.  The organization represents more than 6,000 locksmiths in the United States, Canada, and other countries, making it the largest association of its sort in North America, and conducts professional proficiency certifications for its members.

(ISC)²: The International Information System Security Certification Consortium, or (ISC)², is a non-profit organization which specializes in information security education and certifications.  It has been described as the "world's largest IT security organization".  The most widely known certification offered by (ISC)² is the Certified Information Systems Security Professional (CISSP) certification.

Chartered Security Professional: Chartered Security Professional (CSyP) is a professional certification in security offered by the Worshipful Company of Security Professionals, a livery company in the City of London.  The certification has been established to show the attainment of strategic and higher operational level competencies in security.  The Register of Chartered Security Professionals is managed by the Security Institute and overseen by the Chartered Security Professionals Registration Authority (CSPRA).

Certified Payment-Card Industry Security Manager: Certified Payment-Card Industry Security Manager (CPISM) is an independent payments industry certification governed by the Society of Payment Security Professionals (commonly known as the SPSP).  The CPISM is the de facto certification for payment security professionals.  This certification is held by members from diverse backgrounds including Level 1 - 4 Merchants, Acquirers, Issuers, QSAs, Processors, Gateways, Service Providers, and Consultants.  All CPISM holders are members of the SPSP.

American Board of Physical Therapy Specialties: The American Board of Physical Therapy Specialties, often abbreviated ABPTS, coordinates and oversees the specialist certification process, is the governing body for certification and recertification of clinical specialists.  This board is composed of nine individuals: board-certified physical therapists from five different specialty areas; one physical therapist member of the American Physical Therapy Association (APTA) Board of Directors; one physical therapist representing the APTA Council of Section Presidents; one individual with expertise in test development, evaluation, and education; and one non-physical therapist representing the public.

ASIS International: ASIS International, headquartered in Alexandria, Virginia, is a professional organization for security professionals.  It issues various certifications, standards, and guidelines for the security profession.

Certified Protection Officer: The International Foundation for Protection Officers (IFPO) Board of Directors established and maintains a voluntary certification process called the Certified Protection Officers (post nominals: CPO) course, which is based on current and valid standards that measure competency in the practice of private security for Security Officers.  The IFPO requires that all programs that offer a certification must be maintained by the individual through a re-certification process.  Therefore the CPO certificate is valid for a period of two years, at which time re-certification must be achieved.

Supporting paragraphs: Physical Security Professional ASIS International
Answer: ASIS International