Whether your evaluator needs specific credentials, such as a Ph.D., depends first on your funder, so check the solicitation for any qualifications it requires. NSF's Advanced Technological Education program, for example, asks for an evaluator independent of the project and, if one is named, a biographical sketch, but it doesn't set a degree requirement. When your funder doesn't require a particular degree, the degree is one signal among several. A doctorate usually means formal training in research methods, which can matter for a complex evaluation, but it can't tell you whether an evaluator will design an evaluation your team can use. Their evaluation experience, the fit between their methods and your questions, and how they work with people tell you more.
Read your solicitation's evaluation requirements first, then judge each evaluator on their experience evaluating projects like yours and how they'd approach your evaluation.
The solicitation tells you what is required, and the evaluator's experience and approach tell you what a degree can't: whether they'll be a useful partner for your project.
Ask each evaluator you're considering to describe an evaluation they've led that resembles yours and what the project team did with the findings.
Whether your funder requires a specific degree for the evaluator is in the solicitation, so read its evaluation section and its budget instructions before you choose. NSF's ATE solicitation is one example of what a funder may ask for. It requires funds for an evaluator independent of the project and, if the evaluator is named in the proposal, a biographical sketch in NSF's format. It doesn't specify a degree. Other funders and programs may set different requirements, and your institution may have its own rules for consultants.
Even when no degree is required, the evaluator's qualifications still matter to the proposal. If you name an evaluator, reviewers will see who will conduct the evaluation and why they are qualified for this project. Do I need to name an external evaluator before my grant is funded? covers what the proposal needs in that case.
What a doctoral degree tells you about an evaluator is that they've had extensive formal training in research design, methods, and analysis. Often it also means they've taught or conducted research. That training can matter when an evaluation involves complex methods, longitudinal data, or careful work with human subjects.
What a Ph.D. doesn't tell you is how the evaluator will use that training on your project. Evaluation and research are related, but their purposes differ. Research generally seeks knowledge that extends beyond one setting, while evaluation seeks to understand and improve a specific program. A research-oriented approach can add complexity an evaluation doesn't need, such as measuring every possible construct or administering many validated scales. So a doctorate is a useful signal of training. It's still worth asking how the evaluator decides what your evaluation needs to know, as distinct from what would be interesting to study.
Alongside credentials, look for experience evaluating projects like yours, methods that fit your questions, and the ability to work well with the people involved in your program. The American Evaluation Association's Evaluator Competencies are one framework for what evaluators need. They group the work into five areas: professional practice, methodology, context, planning and management, and interpersonal skills, which include communication and facilitation. A degree speaks mostly to methodology, and the other areas show up in how an evaluator plans the work, understands your setting, and communicates with your team.
The association also notes that an area of practice listed in its directory doesn't indicate certification or expertise. That's one more reason to ask about experience directly. Whether an evaluator understands your field, your students or participants, and your institution is its own question, covered in Will the evaluator understand our field and our people?
We both hold doctorates in sociology, and we've both taught at colleges and universities. As sociologists and former and current faculty members, we understand both sides of evaluation. We understand rigorous research methods, data collection, analysis, and evidence. But we also understand what it's like to be the faculty member, project director, center leader, or nonprofit professional responsible for actually doing the work.
We can talk about rigorous methods when they're relevant, but sophistication should never be the point. The question is always how the evaluation will help a project team understand its work better.
Whether there's a certification for program evaluators is worth asking each candidate about directly, because a listing alone won't tell you. The American Evaluation Association, a professional association whose members are evaluators, notes that an area of practice listed in its directory doesn't indicate certification, and it publishes competencies describing what evaluators need to do well. If a candidate mentions a certification, ask what it required and how it relates to your project.
A master's-level evaluator can be enough for a federal grant when your solicitation doesn't require a specific degree and the evaluator has experience with evaluations of your kind and size. Check the solicitation first, then weigh the evaluator's experience and approach the same way you would for anyone else.
Whether the evaluator should have a degree in your field, such as engineering or education, depends on your solicitation, so check it first. What the evaluation itself requires is an evaluator who understands your program's context, and Will the evaluator understand our field and our people? covers how to tell.
Reviewers may care about the evaluator's credentials when an evaluator is named in the proposal, because the biographical sketch shows who will carry out the evaluation plan. What reviewers can see is whether the evaluator's experience matches the plan the proposal describes.