STAFF

Get to know us.

Who We Are

John Volk
President
John Volk

President

John Volk has been in the traffic control industry for many years. Officially establishing Work Zone Traffic Control in 2004.

In his spare time he enjoys his lakeside get away cabin, his family and his hunting trips, both native & exotic hunting expeditions.

Jay Blumenstock
Vice President
Jay Blumenstock

Vice President

Jay grew up in California, he started in the industry in 1993, he relocated to Colorado in 2021, he enjoys spending time with family and friends.

Trenton Karle
Denver Branch Manager
Trenton Karle

Denver Branch Manager

Trenton Karle is the Branch Manager for Denver, CO. Raised in Pueblo, CO Trenton spread his wings and ventured off to Arizona for 7 years!

After moving to Denver, CO from Buckeye, AZ he started his career with Work Zone Traffic Control.

In his free time he enjoys motocross, football, camping, fishing and all the finer things Colorado life has to offer! He also enjoys spending time with his pups and the enjoyable times with his family and friends.

Mike Harris
Regional Operations- Colorado Springs Branch Manager
Mike Harris

Regional Operations- Colorado Springs Branch Manager

Mike has been doing traffic control for over 20 years, He works hard and enjoys sharing his knowledge with the younger generation,

In his spare time he enjoys restoring and collecting vintage stereo components.  His favorite pastime is watching over his (4) Grandchildren.

David Ranney
Pueblo Branch Manager
David Ranney

Pueblo Branch Manager

David has been with Work Zone for 14 years. His hobbies include playing golf, hunting and working on cars. He also enjoys spending time with his family and friends.

Derek Robinson
Sign Crew Manager
Derek Robinson

Sign Crew Manager

Derek was born and raised in Pueblo West, Colorado and is still located there. In his free time, he enjoys hunting, fishing and the outdoors with friends and family.

Casey Lohrmeyer
Office Manager
Casey Lohrmeyer

Office Manager

Casey has grown her roots, born and raised in Pueblo, CO. She has been with the company for over 10 years and strives to continue the legacy her father built in the company.

In her spare time she enjoys camping, horses and family time!

Charlett Warren
Human Resources
Charlett Warren

Human Resources

Charlett is from Durango, CO. She relocated to Colorado Springs in 2019. Charlett holds a bachelor’s degree in marketing and her master’s in human resource management. In her spare time, she enjoys spending time with her family. She has 2 children and 2 grandchildren.

Lexy Medina
Accounts Payable Coordinator
Lexy Medina

Accounts Payable Coordinator

Lexy is responsible for all payable functions within the company.

When she is not at work or buried in homework, she can be found loving on her pup, at the gym, or lost in a book.

She also loves spending her free time with her nieces and nephews and exploring all that Colorado has to offer.    

Donald Janssen
Safety Manager
Donald Janssen

Safety Manager

Donald moved to Colorado in 1980 from Wall Lake Iowa, he married Monica Terrones in September 1981, They have 4 kids, Stephanie, Freddie, Jarrod, Ray and 14 grands kids, On his days off he likes to  spend time with his family. Going to church and ball games of the grandkids.

Casey Ferguson
Payroll Coordinator
Casey Ferguson

Payroll Coordinator

Casey has spent most of her life in Pueblo Colorado and has been involved with the construction industry for several years.

She and her husband have 3 boys and enjoy spending quality time together.

Manuel Pedraza
Assistant Manager
Manuel Pedraza

Assistant Manager

Manuel is Assistant Manager for the Pueblo, Colorado Springs, and Denver offices.

Previously, he spent 11 years working in law enforcement where he received numerous merits for his hard and brave work, to include a Medal of Valor. Manuel loves spending time with his wife Taylor and working out. He has a strong passion for team building and brings concrete leadership skills to Work Zone.

Nona Manchego
Accounts Receivable Specialist
Nona Manchego

Accounts Receivable Specialist

Nona was born and raised in Pueblo County.  She married her husband Jerry in 2011 and became a stepmother of 2 and shortly after had 2 children of her own.
In her spare time, she enjoys working with her livestock, putting on bull ridings and spending time with her family and friends.
Amanda Bengtson
Controller
Amanda Bengtson

Controller

Amanda, a Pueblo County native, has held a few leadership accounting roles before joining Work Zone and holds a Bachelor of Science Administration with an emphasis in Accounting from Colorado State University – Pueblo.  In her spare time, she can be found crafting, camping, or cheering on her 5 kids at their sporting events.