Admiral Mattea Hahn was a Starfleet officer who served in the role as Chief of Starfleet Operations in the 2260s.
In 2265, Hahn ordered the USS Enterprise to proceed to the Antares Ship Yards from Starbase 20, so that the vessel could undergo a minor refit similar to the ones performed on the USS Constellation and USS Defiant. (TOS - Crucible novel: The Fire and the Rose)
- It has been noted that the Crucible novels take place in a different continuity than other stories, specifically My Brother's Keeper where the Enterprise visited Starbase 33 for the post-Delta Vega repairs and then heads to Earth.
| Starfleet Operations personnel | ||||||||||||||||||||||||||||||||||||||||||||||
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| Chief of Starfleet Operations | Matthias W. Jefferies • Mattea Hahn • Chris Richards • James T. Kirk • Los Tirasol Mentir • James Leyton • Philip Herthum • Yoshi Fukazima |  
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| Other personnel | 23rd century | Kevin Riley • N.J. Weiland | ||||||||||||||||||||||||||||||||||||||||||||
| 24th century | Greg Agalsoff • Jiarui Bai • Rick Berman • Ian Calip • Carstairs • Christine Clark • Michael Crow • Yihong Ding • Gene Han • Ellen Hornstein • Jon Joffin • Len Levine • Jimmy Lindsey • Paul Lawrence • Jeffrey Lombardi • Maria Mantia • Crescenzo Notarile • Gregory Quinn • Alex Russ • Matt Sagona • Santin • Maxwell Thorpe • Frank Tignini • Mike Visencio • Andy Weder | |||||||||||||||||||||||||||||||||||||||||||||
| First Splinter timeline | Elizabeth Kadin | |||||||||||||||||||||||||||||||||||||||||||||