Jarkko Mäkinen was a human male on active service as an officer in the Federation Starfleet in the early 2400s.

Mäkinen appears to be Finnish based on his name and his use of "Perkele", a Finnish profanity.

In 2406, Mäkinen held the rank of lieutenant commander and was commanding officer of USS Nazareth. Along with Lieutenant Commander Kanril Eleya, commander of USS Kagoshima, and Bardak, commander of USS Leran Manev, he responded to a possible attack on the colony of Turtle Bay on Rabaul III. He engaged and destroyed a Klingon B'rel-class bird-of-prey after Kanril baited it into leaving formation.

After reporting the results of the mission to Admiral Stephen Alcott, Commander Kanril requested Mäkinen for a proposed unit to raid Klingon positions. (The War of the Masters: "Sound the Alarm")