Some employers choose to meet mercenary groups directly, while others do not. For someone of Prince Ben Suharitan's caliber, it would be laughable if he had to personally step out just to hire a few mercenaries.
It's precisely because of employers like Prince Ben Suharitan that intermediary agencies exist, creating the space for individuals like Tomler and Krulney to operate. This also provides Krulney and his ilk the opportunity to exploit both ends during a transaction.
The process works like this: Prince Ben Suharitan hires Tomler to find mercenaries for a specific task. Tomler, in turn, contacts a mercenary group to execute Prince Ben Suharitan's request. Once the full payment is received, Tomler skims off a portion and hands the remainder to the mercenary group. That concludes the transaction.