Professional Genealogist Credentials: CG, CGL, and What They Mean
Genealogy has no universal licensing requirement — anyone can hang out a shingle and call themselves a professional researcher. That's precisely why two credentials issued by the Board for Certification of Genealogists carry real weight: the Certified Genealogist (CG) and Certified Genealogical Lecturer (CGL). Both require demonstrated competency, not just paid membership or a completed course, and understanding what each represents helps clients and aspiring professionals alike make better decisions about research and career paths.
Definition and scope
The Board for Certification of Genealogists (BCG) is a nonprofit credentialing body established in 1964. It operates independently of any genealogical society and sets the professional standard against which applicants are measured.
Certified Genealogist (CG) designates practitioners who have proven they can conduct original research at a professional level — locating records, resolving conflicts between sources, and presenting findings in well-documented written form. The credential applies to those doing client research, heir location, lineage-society applications, and similar research-for-hire work.
Certified Genealogical Lecturer (CGL) targets a narrower scope: education and public presentation. A CGL has demonstrated expertise in communicating genealogical methods and knowledge to an audience — a skill set distinct enough from archival research that BCG treats it as its own credential. A genealogist could hold both, one, or neither.
Neither credential is a license. Holding a CG or CGL does not legally authorize anything. What it does is signal that an independent, structured review process confirmed the holder's competence against BCG's published Genealogical Standards — the same standards underlying the Genealogical Proof Standard, which governs how conclusions must be reasoned and documented.
How it works
Certification is not a test taken on a Tuesday afternoon. The application process for the CG credential is a portfolio submission reviewed by a panel of peers.
A CG application requires five components:
- Kinship determination case study — a documented research problem solved from start to finish, demonstrating source correlation and conflict resolution
- Research report to a client — a professional-grade report showing how findings are communicated
- Document work samples — transcriptions and abstracts of records, demonstrating accuracy
- Evidence correlation — a complex case where multiple source types must be weighed against each other
- Lineage summary — a narrative presentation of a family line using proper genealogical citations
BCG evaluators assess each component against its Genealogy Standards (2nd ed., 2019). Applications are reviewed blind — the evaluating panelists do not know who submitted the work. If the portfolio is approved, certification is valid for 5 years, after which renewal requires demonstrating continued professional engagement through a separate process.
The CGL credential uses a different mechanism: applicants submit written educational materials and a recording of a lecture, which are evaluated for accuracy, pedagogical clarity, and adherence to professional standards. The dual-track design reflects a practical reality — great lecturers are not always the people you want reconstructing a tangled 18th-century probate chain, and vice versa.
Common scenarios
Three situations tend to push the question of credentials to the front of the conversation.
Lineage society applications. Organizations such as the Daughters of the American Revolution (DAR) and the Sons of the American Revolution (SAR) require documented proof of descent. A CG is recognized as a qualified preparer of supporting research. Hiring an uncredentialed researcher for a lineage application does not disqualify the application, but a CG's report carries demonstrable credibility with the reviewing body.
Legal and probate matters. When heir location or estate research requires defensible documentation — work that may be examined by attorneys, courts, or trust officers — a credentialed researcher's report is treated with considerably more weight. The National Archives regularly receives inquiries tied to inheritance research; the quality of documentation submitted varies dramatically depending on who prepared it.
Client research projects. Someone hiring a professional genealogist for a complex research project — brick-wall ancestors, immigration origins, unknown parentage — benefits from knowing the researcher has cleared an independent evaluation. The credential does not guarantee results (no one can guarantee archival discoveries), but it does confirm that the methodology will be sound.
Decision boundaries
When credentials matter most: Research tied to legal consequences, lineage society requirements, DNA-based unknown parentage investigations, or any context where someone other than the client will scrutinize the work. In these situations, the documented methodology and professional accountability that come with BCG certification are functional advantages, not merely status markers.
When credentials matter less: Casual family history projects, basic online database searches, or situations where the client has strong research skills and is essentially looking for a collaborator rather than an independent authority. The genealogy research methods used in straightforward cases — pulling a death certificate, locating a census record — don't require a credentialed practitioner, though rigor in citing genealogical sources still matters regardless of who does the work.
CG vs. CGL in practice: If the need is research, look for a CG. If the need is education — a presentation to a genealogical society, a workshop on methodology, a library program — a CGL credential speaks more directly to that demonstrated competency. Some practitioners hold both; the BCG's online directory is searchable by credential type and specialty.
The broader landscape of genealogical research — its standards, sources, and scope — is covered across the genealogyauthority.com reference collection. Credential questions are one piece of a much larger picture, but they're the piece most people wish they'd understood before they started.