By Michael Barr
Note: This article offers practical guidance for attorneys engaging technical experts. It is general commentary, not legal advice. Consult counsel about any specific matter.
Over the last two decades I have sat on every side of the expert witness market. I have been the testifying expert on the stand. I have run an engineering firm whose consultants were hired as experts. And today I run a company whose whole job is matching attorneys with the right expert for a case. So when a litigator asks me "which expert witness firm should I use," I can give an answer with less self-interest than you might expect, because the honest answer is: it depends on which of three very different things you actually need.
Every organization selling expert witness services is one of three animals wearing similar clothing. Knowing which animal you are talking to, and which one your case needs, matters more than any individual firm's marketing.
The short version: boutique shops are tiny, often one to three experts built around a single respected name, and strong only when your case lands exactly on that name's specialty and schedule. Directories sell you access to a long list of self-listed experts and leave the vetting to you. Brokers search, vet, and match an expert to your case, typically free to the attorney, with their fee built into the expert's rate. Know which one you are talking to before you weigh what they say.
The three models, honestly compared
Boutique shops: the tiny specialists
Most boutiques in the expert witness world are small. Not small like a fifty-person consultancy; small like one to three people, usually built around a single well-known name who testifies, plus a colleague or two who support the analysis. When your case lands exactly on that person's specialty, and their calendar is open, you can get real quality: the principal's reputation is the entire business, and they know it.
Everything to be careful about follows from the size. A bench of one has no depth. If the principal is booked, conflicted out, or double-scheduled into another trial, there is no equivalent expert behind them, and litigation calendars are set by courts, not by the expert. Conflicts are all-or-nothing: one prior engagement sidelines the whole shop. A tiny shop also has every incentive to say yes to work at the edge of its specialty, and a case half a step outside the principal's real depth gets the specialist's brand without the specialist's expertise. Ask precisely what they are deep in, and be suspicious when the answer stretches to fit your facts.
Directories and marketplaces: the long lists
A directory sells breadth. Thousands of listed experts across every conceivable field, searchable by keyword, sometimes with a referral fee or subscription attached. If you enjoy running your own search, and some litigators genuinely do, a directory gives you raw material no boutique can match.
Be clear about what a directory is not. The listings are typically self-authored, the credentials self-reported, and the vetting yours to do. The associate hours spent screening candidates are real money, and an associate can rarely judge whether a candidate's claimed expertise is deep or decorative. The directory's incentive is completed referrals, not case outcomes. I have seen strong experts found through directories. I have also seen an impressive-sounding listing turn out to belong to someone who had not written production code in twenty years, and it was opposing counsel who figured that out first.
Brokers and matchmakers: the curated search
A broker, which is what Barr Group is, runs the search and vetting for you, then stands behind the match. The attorney typically pays nothing for the search; the broker's fee is built into the expert's hourly rate. The good ones maintain a deep, pre-vetted network, check conflicts before you ever hear a name, and match on the specific technology of the case rather than on keyword overlap.
The catch to watch for: brokers vary enormously in whether the vetting is real. Anyone can forward three CVs and call it a recommendation. Ask who reviews the candidate's technical claims, and whether the reviewer is an engineer or a salesperson. A broker whose screeners cannot read a CV critically is just a directory with better manners.
And there are cases where a broker is the wrong call. If your matter lands exactly on a strong boutique principal's specialty, and that person is available and conflict-free, hiring them directly can be simpler. If you already know exactly who you want, you do not need a matchmaker. We tell attorneys this when it is true, because the referral we decline this year is the search we are trusted with next year.
The comparison at a glance
| Boutique shop | Directory | Broker | |
|---|---|---|---|
| Typical size | One to three experts around one name | Thousands of self-listed experts | Curated network, vetted per case |
| Who does the search | Nobody; you get the principal | You | The broker |
| Who vets the expert | You are relying on the principal's reputation | You | The broker, before you see a name |
| Cost of the search | None, but no alternatives either | Subscription/referral fee plus associate hours | Typically free to the attorney |
| Fee model | Principal bills expert time | Expert bills; directory takes fee or subscription | Expert bills; broker fee inside the hourly rate |
| Conflicts and availability | All or nothing; one conflict or trial date sidelines the shop | Per expert, checked by you | Checked per expert before introduction |
| Best when | Case lands exactly on the principal's specialty and calendar | You want to run the search yourself | You want the search and vetting done right, once |
Seven questions to ask any expert witness firm
Whatever the model, the same questions expose whether you are buying substance or a brochure:
-
Who actually reviewed this expert's technical claims, and what are that reviewer's credentials? If the answer is a recruiter with a keyword list, keep looking.
-
How was the conflict check run, and when? Before the introduction, or after you fell in love with the CV?
-
What does the testimony record look like? Depositions survived, Daubert challenges weathered, exclusions if any. A firm that cannot produce this quickly has not looked.
-
Who will do the underlying analysis? The name on the report and the hands on the code are sometimes different people. You want to know both, and you want the review team vetted as carefully as the witness.
-
What happens if the expert becomes unavailable? Illness, conflicts discovered late, a schedule collision with another trial. Ask about the bench behind the name.
-
How is the fee structured, and who pays whom? Get the whole chain in writing. A model where the firm is paid only if you retain aligns incentives; a model that charges you to search does not guarantee better results.
-
Has this firm placed experts in your specific technology, not just your industry? "Software" is not a specialty. Firmware, protocol design, machine learning, and database internals are. Match at that level, as we argue in our guide to choosing a technical expert.
Where we sit, stated plainly
Barr Group is a broker with an engineering core. Our screeners are engineers because our founders are engineers, and the experts we recommend are vetted by people who have themselves testified and run source code reviews under protective orders. The search is free to the attorney, our fee is built into the expert's hourly rate, and we are paid only if you retain, so we have no reason to push a mediocre match. That is our model and our bias, disclosed. Judge us by the seven questions above; we wrote them because we like how we answer them.
Choose the animal, then the firm
The expert witness market is not one market. It is three models with different incentives, and most bad engagements trace back to hiring the wrong model, not the wrong firm. Decide first whether your case needs a specialist shop, a long list, or a curated match. Then make whichever firm you talk to answer the seven questions. The firms worth hiring, in any of the three categories, answer them easily.
Barr Group's team of electronics and software expert witnesses provide experienced and unbiased source code reviews, expert reports and testimony for product liability, patent infringement, software copyright, and trade secrets litigation involving computer-based technology and software. HIRE AN EXPERT