Starting out in Starfleet Academy as a command student, Blackmer transferred to security before graduation and was posted at Starbase 189 as his first assignment in 2365. After a five year tour, Blackmer transferred to Helaspont Station and completed a second five year mission there.
While performing well on his evaluations, Blackmer did gather several demerits and was reassigned from station duty to a series of starships, beginning in 2375, which included the starships USS Trieste, USS Nova, USS Sarek, and the USS Bellerophon. Blackmer was eventually assigned to the USS Perseverance where he rose to the position of Chief of security and was promoted to lieutenant commander.
Shortly after his promotion, however, the position of Security Chief on Space Station Deep Space 9 became available after the death of Lieutenant Commander Evik Nath. Due to his familiarity with stations, and his preference to serve aboard them, Blackmer requested a transfer to the station and was reassigned there in August 2382. However, his early time on Deep Space 9 was plagued by problems developing relationships with the crew. While he was able to develop a friendship with Cenn Desca and Prynn Tenmei, his relationship with Captain Ro Laren was rocky as she did not trust him. In time he was able to develop a working relationship with the Captain.
In June 2383, Blackmer spearheaded the investigation into threats to destroy DS9. He was present on the station during an attack by members of the Typhon Pact designed to hide the theft of Dominion technology. During this assault he and his team discovered a series of bombs planted aboard the station; however, he did not believe them a threat to the station as they did not appear to be of sufficient yield to destroy the station. (ST - Typhon Pact novel: Plagues of Night)
- ST - Typhon Pact novel: Plagues of Night
- ST - Typhon Pact novel: Raise the Dawn
- ST - The Fall novel: Revelation and Dust
- DS9 novel: Sacraments of Fire
- ST - The Fall novel: A Ceremony of Losses
- DS9 novel: The Missing
- DS9 novel: Ascendance
|Helaspont Station and residents|
|station personnel||Bartels • J. Blackmer • Farish • E. Freemantle • French • J. Harriman • J. San Luis • A. Sasine|
|station residents||Javiers • G. Rochambeu|