Jo van Dreenan was a member of Starfleet in the 23rd century. In 2269 he was posted on the USS Enterprise as a security specialist. He was being treated by Leonard McCoy when he was taken by Kulkulkan. (TOS - Star Trek Log Six novelization: How Sharper Than a Serpent's Tooth)

USS Enterprise (NCC-1701) security & tactical personnel
under Robert April	F.D. Reed	under Christopher Pike	Bryce • Collins • Endel • Hardin • Orloff • D. Reed • Ross • Smith • Takahara • Tuval • Valdini
under James T. Kirk (first five-year mission)	Abrams • al Auriga • al-Baslama • Alan • Ames • Anderson • Anderson's impostor • Apple • Archer • Aristeides • Arrunja • Atete • Autry • Bailey • Bardoli • Baxter • Beason • Beltre • Berengaria • Boggs • Borido • Bounds • Brennan • Brentano • Brickston • Buchert • Butterfield • Carlisle • Carlucci • Carver • Chavez • Chekov • Chevalier • Ching • Collier • Collins • Compton • Corcoran • Cordova • Creighton • Cruz • Darnell • Davison • Davoff • DeCamp • DeCastro • Devereaux • Dickerson • Digard • Doyle • Dunhill • Endercott • Esswein • Evans • Everts • Ferris • Fields • Fitzgerald • Freeman • Flynn • Franklin • Friedman • Fuller • Gabler • Gallagher • Galloway • Garrovick • Gary • Gemas • Giotto • Gomez • Grant • Hacker • Hadley • Hallie • Hanashiro • Harrison • Hasmid • Hendorff • Herring • Hevelin • Hilambo • Hixon • Hrolfson • Huff • Inciviglia • Jakobs • Jameson • Jamison • Johnson • Johnstone • Josephs • Kaplan • A. Kaplan • Kasuki • Kelly • Kellum • Lamia • Lemli • Leskanich • Leslie • Lewis • Lindenbaum • Lindsay • Ling • Lopez • Lowry • Mallory • Manning • Marple • Masaryk • Masters • Mathews • Matthews • McGaren • Montgomery • Meyers • Michaels • Mocre • Moore • Mosley • Nairobi • Namura • Ndugu • Neal • Nelson • Neon • Nguyen • Nored • O'Herlihy • O'Hyr • Olag • Olaus • O'Neill • Onorax • Ordover • Organa • Osborne • O'Shay • Oyama • Paikert • Patten • Pauli • Phillips • Ragsdale • Rainer • Rayburn • Reems • Reichert • Rivera • Rizzo • Robinson • Rowe • Sanders • Schang • Shanti • Shea • Sheckley • Shimada • Silverman • Snnanagfashtalli • Spencer • Stanger • Steib • Steinberg • Stragey • Suarez • Swensen • Tamura • Tanka • Thomas • Thorton • Timmons • Tomson • Trancas • Trucco • Tuan • Ush • Valdini • van Dreenan • Van Pelt • Vinci • Vorozh • Wein • Wheeler • Williams • Wilson • Wodsworth • Wolfman • Wood • Worsley
subsequent missions under Kirk & Spock	Aragonés • Arrunja • Anderson • Barnes • Barrasso • Bergstresser • Byrnes • Carver • Chavez • Chekov • th'Clane • Coffey • Collins • Corey • Davidson • Dobius • Emigh • Estano • Fox • Friedman • Galloway • Howard • Hrdina • Jaffe • Jagr • Kelowitz • Keth • Kinitz • Lemieux • Leno • Markson • Matlock • Mendoza • Merlino • Mosley • Mullen • Murphy • Nizhoni • Ohara • Padilla • Paek • Pearson • Perez • Pfeiffer • Phillips • Mark Publicker • Pulaski • Ralston • Ramirez • Randall • Recchi • Richardson • R'leez • Robinson • Samuelsson • Santana • Sternbach • St. John • Sweeny • Tanka • Tate • Tenzing • Tiilson • Tocchet • Trottier • Vlastikovich • Wagner • Worene • Workman
see also: administrative personnel • communications personnel • engineering personnel • medical personnel • pilots & flight control personnel • sciences personnel • senior staff • unnamed