Providing professional and exceptional access to communication.

Our Interpreters

Kasey Entwisle, President/Owner


Hello! Welcome to ISI's website!  My name is Kasey Entwisle and I am the current President of ISI, LLC.  I graduated from Southeast Technical Institute with my AA degree in English to ASL Interpreting in 1997.  I received my Certificate in Educational Interpreting from Front Range Community College in 2001 and in 2009 I received my BA degree in Business from Bellevue University.  I have had a variety of experiences in the past 13 years including education, medical, legal,VRS and VRI.  I continue to develop new and exciting jobs within our companies and I am always excited to provide jobs in my home state of South Dakota.  Thanks for visiting our website!

Email Kasey:

Jessica Rykhus, Independent Interpreter

Hello!  My name is Jessi Rykhus.  I was born and raised in a small town in Southwest Minnesota. I chose the interpreting field after realizing my job at the time was going nowhere.  I recalled a conversation with my friend about her interest in becoming an interpreter.  She has deaf family members whom I knew and thought interpreting would be such a rewarding career.  I decided to do some research and go for it. I moved to Sioux Falls in 2002 to pursue a degree in Interpreting, and I haven't regretted that decision yet. I graduated from STI in 2004 and have been working with ISI LLC ever since. I am NIC Certified as well.  The best thing about it is I was able to interpret for her family members and thank them for getting me into this field.  Thanks in advance for letting me satisfy your interpreting needs!           



David Thomson, Independent Interpreter


David Thomson graduated with a Bachelor of Arts Degree in Sign Language Interpreting from Augustana College in 2010. Following his academic studies, David began working in a variety of settings freelance interpreter. David is current NIC Certified. He has had some amazing experiences during his exciting career and looks forward to many more!!! In his free time he enjoys biking, being outdoors and spending time with his family.


Nicki Hutchinson, Independent Interpreter



Nicki Hutchinson was born and raised in Grand Forks, North Dakota. She graduated from the University of North Dakota with Bachelor’s Degrees in Early Childhood, Elementary Education & Special Education.  She moved to Sioux Falls in 2008, and went on to complete her Bachelor’s Degree in Sign Language Interpreting at Augustana College in 2012. 

She is NIC certified and also EIPA certified.  She enjoys working in a variety of settings including: VRS, Educational, Medical, Mental Health, and Performance.

Nicki lives in Sioux Falls with her husband John, son Xavier, daughter Xyla, and two dogs Stella & Luna.

Joanna Zimmer, Independent Interpreter



Hello! My name is Joanna, but most people call me Jo. I am the mother of three children, all with varying degrees of hearing loss. I attended Mount Marty College in Yankton, SD, earning a BA in Behavioral Science/Psychologyand Music. I later earned my Master's Degree in Community Agency Counseling at the University of South Dakota. I worked at Children's Inn with victims of domestic violence, both women and children for nearly a decade. I was awarded Employee of the Year there in 2008. I then attended Augustana College, where I completed the ITP (Interpreter Training Program). I passed my EIPA (Educational Interpreter Performance Assessment) and am also nationally certified, having passed the NIC (National Interpreter Certification) exam. I have been interpreting for nearly four years, and learn more every day.


  Leslie Norton, Independent Interpreter



Hi! My name is Leslie Norton and after moving to Sioux Falls with my family in 1992, I attended STI graduating with an Associate with Applied Science degree as an Interpreter for the Deaf and Hard of Hearing. I have spent the past nineteen years interpreting for the Sioux Falls School District in grades K-12. My passion is working with children of all ages.

I was born in Japan, but raised in Nebraska. I also hold an Associate Degree in Dental Assisting which was my career for fifteen years while living in Kansas and Nebraska with my husband and two daughters.

I enjoy reading, sewing, traveling, working on genealogy, and time with our granddaughter.

Melissa Cink, Independent Interpreter

Cathy Strand, Independent Interpreter

Hello! My name is Cathy Strand and I have been an employee of ISI since Kasey took over the business. I graduated from Southeast Technical Institute in 1998 with my AA Degree in ASL to English Interpreting. I received my Certificate in Educational Interpreting from Front Range Community College in 2001. I am also a certified member of RID. Although I have had many interpreting experiences throughout the years, my passion is in the educational setting. I currently reside in Valley Springs, SD with my husband, Chad and two children, Connor and Cierra.



Pam Titus, Independent Interpreter

 Hello, my name is Pam Titus and I have been an interpreter for 18 years. I graduated from the STI program, which gave me an Associates Degree in the Interpreter Training Program. I have done most of my interpreting in the educational setting. I did my internship with the community. My family consists of my husband Jay who is a firefighter for Sioux Falls, my daughter Brianna is a sophmore in college, and my sons Seth and Ryan are in high school. I love being at home and celebrating with my extended family.



Aubrey Byrnes, Independent Interpreter

Aubrey was born and raised in Sioux Falls, SD.  She attended South Dakota State University where she graduated with a Bachelor of Science degree in Communication, Speech and Theater along with her Teaching Certificate in 7-12: Language Arts.  She attended Augustana College and graduated in 2013 with a Bachelor of Arts in Sign Language Interpreting.  She currently is NIC certified has her along with her EIPA Certification.  Aubrey and her husband Rick have two miracle babies, Wyatt (3) and Colton (2).  She currently lives in Sioux Falls with her husband (Rick), son's, and their two dogs (Lilly and Ace)!  


Mychal Hadrich, Independent Interpreter

Mychal Hadrich was born and raised in the Northland of Minnesota. He graduated with honors from Augustana University (formally known as Augustana College, completing his internship with the Minnesota Department of Human Services: Deaf and Hard of Hearing Services and Essentia Health in Duluth, MN. He is certified by the Registry of Interpreters for the Deaf (RID) and holds the National Interpreter Certification (NIC).  He has comprehensive experience in performance, medical, educational, VRS, VRI, platform, and workplace settings.

Previously, Mychal has served as Region III Representative of the Student Member Section for RID and Workshop Coordinator for SDIA-RID.  On his free time you can find him on a rural highway, training for triathlons.

Kim Johnson, Independent Interpreter

Graduate of Southeast Technical Institute in 2006. After graduation I began my interpreting career in San Diego, CA. I was there for two years interpreting in various settings including elementary, middle, high school and post-secondary education, medical and mental health. I moved home to Sioux Falls in 2008 and have been here working primarily in the VRS field, as well as post-secondary education. In my spare time I enjoy a side gluten free bakery business with a good friend. :)



Katy Koelling, Independent Interpreter

Katy Koelling grew up in Sioux Falls, South Dakota and graduated with a Bachelor of Arts degree in Sign Language Interpreting from Augustana University.  She is currently NIC certified and works in a variety of community settings including secondary and K-12 education, medical, mental health, and workplace. She also has experience in VRS and VRI settings.

Katy currently lives in Sioux Falls and works in the surrounding area. She enjoys working on a variety of fiber arts projects and caring for her collection of houseplants in her downtime. 



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