The Medina technical supervisor receives Roberts's warning too late to share her certainty that the attackers' real objective is the rail guns on the alien station.
Jakulski supervises the Medina technical workgroup that includes Roberts, Salis, and Vandercaust. As the threat of an external attack grows, he becomes increasingly absent from ordinary shifts, assigning work in brief bursts and leaving early with only the explanation that urgent things need doing. His work also includes new redundant communications lasers intended to maintain contact with Duarte's advisers on the alien station.
When the coalition swarm enters the slow zone, Roberts reaches him in Medina's float-side administration offices. Like much of the station, he is still buoyed by the apparent destruction of the incoming boats and does not initially understand her panicked instruction to alert Montemayor. Only when she explains that the force is not attacking Medina but the rail-gun position on Ring Station does the larger danger come into focus.
Jakulski's position makes him a connective figure between ordinary Medina labor and the station's concealed military and Laconian infrastructure, but in this first crucial warning he is caught on the wrong side of the deception.
An adult Belter technical supervisor whose detailed physical features are not described; he wears practical station work clothes and appears on a hand-terminal link from the freefall administration offices with a briefly satisfied grin.
Jakulski oversees the workers maintaining Medina's defenses and becomes the first official link in Roberts's attempt to expose the assault's real target.