I have been interviewing several headhunting companies in Taiwan.
The following info is applicable for every headhunting companies.
And here's my experience,
(1) Cold-calling is basic
(2) Always know your own achievement. No matter in school or at work.
(3) Be specific, straightforward and logical. Never beat around the bush.
Usually there will be three rounds of interview,
(2) Case Study
H&L is probably the only one that starts off with CEO interview.
Here are the details,
(1) HR+Manager: Self-intro, school/career achievement, motivation of application and why do you want to be a headhunter
(2) Case Study: Anonymous company is finding a position of HR/Engineers/Finance/Any position depending on the team that you applied. You have 1 week to find at least 3 resumes before doing a short presentation on your study of the industry and the reasons why you pick thoses resumes.
(3) CEO: general questions. Basically the same questions you will be asked in the first round. Only the CEO needs to see if you're really ok for the company.
Here are the tips,
(1) Be specific, logical, and transparent. Headhunters like fast-learners and smart people. Don't be too proud, don't be too humble, cuz they will know.
(2) Use Linkedin and Cakeresume to find candidates. When studying the industry, study their supply chain, product, business model, competitors, and latest news.
(3) Don't be too humble, don't be too proud. Be real, but don't always show your weaknesses.
(4) If you have cold-calling interviews, never find an identity with conflict of interest (ex. I'm XXX company and I want to find your sales cuz I want to buy your product.) or (ex. I'm XXX company and our company used to use your product before. So I want to find XXX for latest product DM.) Instead, use an identity that stands on a neutral ground. (ex. I'm XXX company and I'd like to invite your XXX for an exposition.) Then ask for ext no. or email.
Hope these infos are helpful!