Five New Troopers Join Missouri Highway Patrol Troop D

Newly graduated officers will serve communities across southwest Missouri

Apr. 11, 2026 at 4:34am

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An extreme close-up photograph of a Missouri State Highway Patrol badge or insignia, dramatically lit by a harsh camera flash against a pitch-black background, conveying a stark, gritty, investigative aesthetic.The addition of five new troopers to Troop D will bolster law enforcement presence and community policing across southwest Missouri.Springfield Today

The Missouri State Highway Patrol's Troop D, headquartered in Springfield, has welcomed five new troopers who recently graduated from the Patrol Academy. The new officers will be assigned to zones covering several counties in southwest Missouri, bringing additional law enforcement resources to those communities.

Why it matters

The assignment of these new troopers to Troop D represents an investment in public safety and community policing across the region. Their arrival will help bolster the Patrol's presence and ability to respond to incidents in the areas they are assigned to serve.

The details

The five new troopers are Joseph DeMasi, Austyn Mendoza, Aaron Powell, Keaton Siebenaler, and Roy Wommack. They graduated from the Missouri State Highway Patrol's 125th Recruit Class on April 10, 2026 and will now be stationed in various zones across southwest Missouri to serve the citizens of Greene, Stone, Taney, Vernon, Barton, Hickory, and Dallas counties.

  • The new troopers graduated from the Patrol Academy on April 10, 2026.
  • They have now been assigned to their respective zones within Troop D.

The players

Captain Dale O. Jinkens

The commanding officer of Troop D, headquartered in Springfield, Missouri.

Trooper Joseph DeMasi

A new trooper assigned to Zone 1, serving Greene County. He is originally from Eagle Pass, Texas and graduated from Mount Vernon High School in 2016.

Trooper Austyn Mendoza

A new trooper assigned to Zone 15, serving Stone and Taney counties. He is originally from Conway, Arkansas and graduated from Two Rivers High School in 2015. Mendoza also served in the United States Air Force for five years.

Trooper Aaron Powell

A new trooper assigned to Zone 1, serving Greene County. He is originally from St. Croix, United States Virgin Islands and graduated from Republic High School in 2017.

Trooper Keaton Siebenaler

A new trooper assigned to Zone 8, serving Vernon and Barton counties. He is originally from Wickenburg, Arizona and graduated from Stockton High School in 2010. Siebenaler also attended Missouri Southern State University.

Trooper Roy Wommack

A new trooper assigned to Zone 16, serving Hickory and Dallas counties. He is originally from Springfield, Missouri and graduated from Buffalo High School in 2012. Wommack also served in the United States Marine Corps for five years.

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The takeaway

The arrival of these five new troopers to Troop D will provide additional law enforcement resources and community policing capabilities across southwest Missouri, helping to enhance public safety in the regions they are assigned to serve.