Our People
Mark Schaible
Owner & President, Sonex LLC
A Sonex employee since 2003, Mark Schaible founded Sonex, LLC in 2022 and purchased the assets of Sonex Aircraft, AeroConversions, and Sonex Aerospace to lead the organization and its staff into the next generation. In his spare time, Mark places a high priority upon volunteering for aviation safety related groups like the EAA Safety Committee.
Steven Severson
Purchasing and Warehouse Manager
Sonex Employee Since 2013
Cris Nash
Production Manager
Sonex Employee Since 2016
Tony Jones
Aircraft Assembly Lead Mechanic
Sonex Employee Since 2018
Nathan Holbrook
Aircraft Assembly Mechanic
Sonex Employee Since 2020
Andrew McDougal
Design Engineer
Sonex Employee Since 2021
Tom Turner
Aircraft Assembly Mechanic
Sonex Employee Since 2021
Stephen Jones
Warehouse Associate
Sonex Employee Since 2022
James Fitzgerald
Assembly Mechanic Intern
Sonex Employee Since 2022
Tyler Nash
Assembly Mechanic Intern
Sonex Employee Since 2022
Char Schaible
“The Boss”
Sonex Employee Since 2024
Sonex Advisor Emeritus
- John Monnett
Sonex Founder
Learn More
Sonex Advisory Board
- Pete Buck
Pete Buck is one of John Monnett’s original design partners, involved in the design of the Monex racer, Moni sailplane, Sonex, Waiex and Xenos, and has a distinguished career as a Lockheed Martin Senior Fellow in Palmdale, CA. - Joe Norris
Joe Norris is a well-known EAA and Sonex staff alumnus, Sonerai II and Sonex builder who has been involved in aviation for over 40 years, and the homebuilt aircraft movement for nearly as long. Joe is a Commercial CFI, A&P/IA and DAR for EAB &LSA aircraft. - Dave Juckem
Dave Juckem is a Chilton, WI machine shop owner and Sonex supplier with a long history of developing products with Sonex. Dave is an EAA AirVenture aircraft judging chairman, Sonex builder, model maker and rocketeer. - Chad Feucht
Chad Feucht is a retired Air Force F-16, F-22 and operational test pilot, former Lockheed Martin and Boeing employee who currently owns and operates a wealth management practice in neighboring Fond du Lac, WI.
John Monnett Biography
- “John Monnett: From Sonerai to Sonex”
by Jim Cunningham
This 150 page biography of Sonex founder John Monnett was written by a Sonex builder and tells the inspiring story of the history behind Sonex Aircraft and AeroConversions products. Signed Copies are available directly from the Sonex Web Store!
On February 28, 1998 John Monnett lifted-off from Wittman Regional Airport in Oshkosh, WI in a completely new aircraft: Sonex serial number 1, or “SX1.” While certainly not the beginning of John Monnett’s journey, the first flight of SX1 marked the beginning of the Sonex Story for us and thousands of others worldwide.
Our Mission
Sonex, LLC is committed to providing the recreational aviation community innovative, cost-effective and efficient aircraft kits, powerplants, and accessories and supporting them with industry-leading customer service.
In addition, Sonex provides leadership to the grass-roots homebuilt community to protect the experimental-amateur built rules and cultivates new pilots and airplane builders through educational efforts.
Our Vision
To continue the Sonex heritage of Product Innovation, Affordability, Simplicity, Versatility, Performance, Engineering, and Quality and to expand these themes into a broader aviation marketplace.