6 Investigator Site Networks Operating in Asia-Pacific in 2026

Asia-Pacific has become a fixture in global trial planning, drawing sponsors with faster ethics approvals, R&D tax incentives in markets like Australia, and access to large, treatment-naive patient populations. An investigator site network gives sponsors a way into that region without building relationships site by site — a pre-vetted group of research clinics, hospitals, or site management organizations already operating to global GCP standards.

The companies on this list operate investigator sites or site management organizations across the Asia-Pacific region. This is an unranked list — the order carries no judgment about quality or fit. This cut of the region turned up a smaller, more concentrated pool than prior US, UK, and Europe site network directories — most APAC hits in this data pull were single-site CROs or hospitals rather than dedicated multi-site networks, so this list is intentionally shorter rather than padded.

Nucleus Network

Nucleus Network is Australia's largest Phase 1 clinical research organization and the only Phase 1 specialist with facilities in Australia, the US, and the UK, operating co-located clinics at the Alfred Hospital in Melbourne, the Royal Brisbane and Women's Hospital in Brisbane, and Royal North Shore Hospital in Sydney. The company was acquired by Blackstone in October 2021 and has conducted more than 1,500 Phase 1 trials, roughly half of them first-in-human, drawing on a healthy volunteer database of more than 800,000 people. Founded in 2004 and based in Melbourne, Australia, Nucleus Network's Australian, US, and UK clinics combine for more than 200 dedicated early-phase beds.

Paratus Clinical

Paratus Clinical operates a network of five purpose-built, research-only clinics along Australia's eastern seaboard, functioning as a Site Management Organization and Investigator Site Network with access to New Zealand. The company's sites have run more than 150 studies across primary and specialist care indications, and it appointed Megan Morrison as CEO in July 2025 to mark more than a decade in the clinical research space. Founded in 2012 and based in Gordon, New South Wales, Paratus Clinical conducts Phase I through Phase IV research, including first-in-human and vaccine studies.

EP-Link (formerly EP-SOGO)

EP-Link operates as a Site Management Organization (SMO) in Japan, supporting clinical trials at medical institutions by connecting patients, hospitals, and pharmaceutical companies to expedite drug development. The company describes itself as a leading player in Japan's SMO industry by scale, performance, and number of clinical research coordinators (CRCs), with clinical trial coordination experience spanning oncology and other therapeutic areas. Founded in December 1999, EP-Link is based in Tochigi, Japan.

CMAX Clinical Research

CMAX Clinical Research is one of Australia's largest and most experienced clinical trial centres, centrally located in Adelaide adjacent to the Royal Adelaide Hospital within South Australia's Bio-Med City precinct. The company supports innovative medical research in partnership with national and international sponsors, positioning its Adelaide facility as a hub within Australia's broader clinical research infrastructure. Founded in 1993, CMAX Clinical Research is based in Adelaide, South Australia.

Pacific Clinical Research Network (PCRN)

Pacific Clinical Research Network brings together a team of doctors and medical professionals who have run clinical trials since 2002, serving New Zealand's diverse patient population. The network positions itself around improving the health and well-being of the communities it serves through its clinical trial work. Founded in 2002 and based in Auckland, New Zealand, PCRN operates as one of the country's established investigator site networks.

NEUES

NEUES is listed on Diligent's platform as a Japan-based Site Management Organization supporting clinical trials and medical research operations, acting as an intermediary between hospitals, clinical investigators, and pharmaceutical companies. Independent search results for a Tokyo-based company of the same name describe medical testing services and beauty salon operations rather than SMO work, so this entry may reflect a name collision between two distinct Japanese companies — worth confirming directly before relying on it. Diligent's platform lists NEUES as based in Minato-ku, Tokyo, Japan.

Explore the full Asia-Pacific investigator site landscape

The companies above represent a portion of a larger field.

Diligent's platform includes over 280 Investigator Site Vendors globally, many with Vendor qualification data available on demand. Book a demo to explore Diligent's full vendor discovery database.

This article is intended as an informational overview of vendors operating in this space. Inclusion on this list does not constitute an endorsement, recommendation, or qualification by Diligent.