A clinical research coordinator (CRC) is the site-level staff member who executes a clinical trial’s day-to-day operations under the delegated authority of the Principal Investigator (PI) — managing participant recruitment and screening, informed consent, protocol-directed visits, source documentation, regulatory paperwork, and communication with the study sponsor and monitor. The U.S. Department of Labor’s O*NET occupational database classifies the role under SOC code 11-9121.01, describing coordinators as professionals who “plan, direct, or coordinate clinical research projects” and oversee compliance with the protocol and clinical goals.
This guide covers what a CRC actually does day to day, how the role relates to the Principal Investigator, and the regulatory and protocol-compliance responsibilities that come with it. For the separate question of how to enter the field and get certified, see How to Become a Certified Clinical Research Coordinator (CRC); for how the CRC role fits alongside the PI, CRA, and other study-team positions, see Clinical Trial Study Teams.
Core day-to-day duties
Participant recruitment and screening
CRCs identify potential participants (through referrals, chart review, or advertising approved by the IRB), explain the study, and conduct pre-screening against the protocol’s eligibility criteria. Participants who don’t meet inclusion/exclusion criteria after formal screening are logged as a screen failure, which sponsors and IRBs track as a standard trial metric.
Informed consent
The CRC typically guides participants through the informed consent process — explaining the approved consent form, answering questions, and confirming understanding — though under FDA regulation (21 CFR Part 50) and ICH E6 Good Clinical Practice, obtaining legally effective informed consent remains a responsibility the PI cannot fully delegate away; the CRC’s role here is typically executed under specific delegation and PI oversight, not independent of it. See Informed Consent Checklist for Researchers for the full process.
Conducting protocol visits
Once a participant is enrolled, the CRC schedules and conducts each visit according to the protocol’s schedule of events — collecting vital signs and specimens, administering questionnaires, coordinating procedures with other departments (imaging, pharmacy, laboratory), and tracking the visit window so procedures happen within the protocol-allowed timeframe.
Source documentation and data entry
Every protocol-required assessment must be captured in source documents (paper or electronic medical record) and then transcribed into the sponsor’s case report form (CRF), usually in an electronic data capture (EDC) system. CRCs resolve data queries raised by the sponsor’s data management team and correct discrepancies with proper audit-trail documentation rather than silent edits.
Investigational product and safety monitoring
Where the trial involves an investigational drug or device, CRCs typically maintain drug/device accountability logs (dispensing, return, and reconciliation records) and monitor participants for adverse events at each visit. Under 21 CFR 312.64(b), the investigator (PI) must report any serious adverse event to the sponsor immediately regardless of causality assessment — in practice, the CRC is usually the staff member who first identifies and documents the event, escalating it to the PI for the required assessment and sponsor notification.
Regulatory documentation and the site’s regulatory binder
CRCs maintain the site’s regulatory files, commonly organized as an Investigator Site File (ISF), and keep the Delegation of Authority (DoA) Log current as staff join, leave, or take on new protocol tasks (see the Delegation of Authority Log Template for what that document actually contains). They typically prepare and submit IRB paperwork — continuing review submissions, protocol amendments, and reportable new-information submissions — on the PI’s behalf, though the PI remains the accountable signatory.
Working with the sponsor and monitor
CRCs are the primary site-level point of contact for the sponsor’s clinical research associate (CRA) during monitoring visits, preparing source documents and the regulatory binder for review and following up on monitoring findings. See Monitoring Visit Trip Report Writing and Site Initiation Visit (SIV) Checklist for what that review process covers from the monitor’s side.
The CRC’s relationship to the Principal Investigator
Regulatory responsibility for a clinical trial does not shift to the CRC just because the CRC performs most of the hands-on work. Under FDA regulation, the investigator named on FDA Form 1572 (21 CFR 312.53) is the individual who “actually conducts” the investigation and, where a team is involved, is defined as the responsible leader of that team — the Principal Investigator. Every other team member, including a physician who examines participants, is a sub-investigator rather than an independent investigator of record. The PI’s Form 1572 commitments include personally conducting or supervising the investigation, ensuring informed consent and IRB review occur as required, reporting adverse experiences per 21 CFR 312.64, and maintaining adequate records under 21 CFR 312.62.
The mechanism that connects the PI’s regulatory accountability to the CRC’s day-to-day work is delegation: the PI (or, on many teams, a designated sub-investigator) formally delegates specific study tasks to specific staff, documents that delegation on the DoA log, and retains supervisory responsibility for how those tasks are carried out. ICH E6 Good Clinical Practice guidance is explicit that any duty transferred still leaves the transferring party’s oversight obligation intact — the same principle that governs a sponsor’s transfer of duties to a Contract Research Organization applies, at the site level, to a PI’s delegation to CRC staff. In practice, this means a CRC’s authority to consent participants, assess eligibility, or administer study procedures exists only within the scope the PI has delegated and documented, and the PI remains responsible for verifying that delegated work was done correctly.
Regulatory and protocol compliance responsibilities
Because the CRC executes most of the protocol in practice, protocol and regulatory compliance is a core part of the role, not a side duty:
- Protocol adherence. Following the approved protocol’s procedures and visit windows exactly, and escalating any proposed deviation to the PI (and, where required, the IRB and sponsor) rather than making an independent judgment call on the CRC’s own authority.
- Informed consent compliance. Using only the current IRB-approved consent form version, documenting the consent conversation and any re-consent triggered by protocol or safety updates, and confirming capacity/voluntariness per 21 CFR Part 50.
- IRB compliance. Submitting continuing reviews, amendments, and reportable events on schedule, consistent with 21 CFR Part 56 IRB requirements.
- Adverse event reporting. Recognizing and documenting adverse events promptly enough for the PI to meet the sponsor-reporting obligations in 21 CFR 312.64(b).
- Good Clinical Practice (GCP). Working to the ICH E6 GCP framework generally — the current core guideline, ICH E6(R3), is the reference standard now used in ACRP’s own CRC certification exam as of the Fall 2026 testing window, replacing the prior ICH E6(R2)-referenced version.
- Recordkeeping. Keeping source documents, the regulatory binder, and the DoA log audit-ready at all times, since sponsor monitoring visits and, less frequently, FDA inspections review these records directly.
Certification and typical qualifications
There is no single universal credential or degree requirement to work as a CRC — O*NET lists related “also called” titles ranging from Clinical Trial Coordinator to Clinical Research Nurse Coordinator, reflecting how differently the role is staffed across sites (research nurses, allied-health graduates, and non-clinical research staff all commonly hold the title). The most widely recognized voluntary credential is the Certified Clinical Research Coordinator (CCRC) offered by the Association of Clinical Research Professionals (ACRP), which requires 3,000 hours of verifiable, paid human-subjects-research work experience (internships and coursework don’t count) and a 125-question exam referenced to ICH GCP guidelines. Full detail on eligibility, the exam, and alternative entry paths is in How to Become a Certified Clinical Research Coordinator (CRC).
Frequently asked questions
What is the difference between a clinical research coordinator and a clinical research associate?
The CRC works at the trial site, employed by the site or institution, executing the protocol day to day. The clinical research associate (CRA) works for the sponsor or a contract research organization and periodically visits (or remotely reviews) the site to monitor the trial’s conduct, verify source data against the CRF, and confirm regulatory documentation is current — the CRA does not perform the trial’s clinical procedures. See Clinical Trial Study Teams for how the two roles interact.
Does a clinical research coordinator have to be a nurse?
Not necessarily. Many CRCs are registered nurses, but the role is also filled by staff with backgrounds in life sciences, public health, clinical research degree programs, or other allied-health fields, particularly on trials where the protocol doesn’t require nursing-scope clinical procedures. Specific licensure requirements depend on the institution and the procedures the role is delegated to perform.
Who does a CRC report to?
Operationally and regulatorily, the CRC works under the Principal Investigator’s delegated authority, documented on the study’s Delegation of Authority log. Many sites also have a research operations or site-management structure (a lead coordinator, clinical trials office, or site management organization) that the CRC reports to administratively, alongside that protocol-level accountability to the PI.
What is the biggest compliance risk area for a CRC?
Documentation gaps are consistently the most common finding in sponsor monitoring and FDA inspections — source documents that don’t match the CRF, consent forms signed with an outdated version, or delegation/training records that lag actual staff changes. Because the CRC generates most of a trial’s source documentation, consistent, contemporaneous recordkeeping is one of the highest-leverage parts of the role for audit readiness.
