Each organism at an individual level builds its system of temporary relationships with the different amplitude of oscillations - an individual biorhythmological portrait. Using Holter monitoring in the AnnaFlash2000 software in the ISCIM6 statistical processing, the ultradian rhythms of the driller crew in extreme northern latitudes studied. It revealed that the individual rhythmic processes of acrophase and cardiac rhythm bathyphase, which testify to the leading role of hypoxia, hypercapnia in adaptive mechanisms, influence the joint professional activity of small labour groups. It established that working in different biological rhythms, the driller’s team has a low degree of compatibility. The synchronization of biological rhythms in the team is achieving by the general properties of temperament as phlegmatic. More successful in adaptation - phlegmatic sanguine. © 2021 Institute of Physics Publishing. All rights reserved.