AVANT ACOUSTICS’ competitive advantage is our team. Our staff is dedicated to providing detailed acoustical and AV design with the highest standard for customer service. Our innovative professionals have made AVANT ACOUSTICS the premier go-to firm for decades. Our commitment to the success of every project is what sets us apart. That’s all thanks to the company we keep… our employees!
Andrew D. Siebert, PE
Drew feels so blessed having the opportunity to lead one of the most capable acoustical consulting and audio-visual design teams in the country. He sincerely enjoys working with the other consultants at AVANT ACOUSTICS and strategizing on how to bring our “more complete” services to more owners, architects, and venues across the globe.
While the project at hand is of utmost importance, Drew is also focused on the long-term client relationship. He is excited to be leading AVANT into our next half-century.
A Professional Engineer licensed in the State of Kansas, Drew received his Electrical Engineering degree from Kansas State University. Several years later, he followed that up with a Masters of Business Administration focusing on business strategy and finance.
When not working, Drew prefers to spend time with his family. He and his wife, Amy, have two children who keep them extremely busy. Camryn is seven and Cecil is five. You might find the Siebert family at a local park or pool enjoying the outdoors during the summer or perhaps doing science and engineering educational experiments at their Overland Park, Kansas home when the weather outside isn’t so friendly.
Robert G. Ledo
Senior Vice President
For 28 years, Bob’s creative audio-visual design and enthusiastic leadership have maintained AVANT ACOUSTICS’ leadership position in the market.
As Senior Vice President of AVANT ACOUSTICS, Bob is actively involved in the design, testing, and commissioning of audio-visual and sound reinforcement systems for all types of facilities throughout the United States and in Germany, Japan, and Korea.
When not designing, testing and commissioning systems – or at KU games – Bob might be off sailing, flying, or running a marathon (yes, he is fast!).
Bob attended Oral Roberts University in Tulsa, where he earned a double major in Telecommunications and Business. He also serves as a guest lecturer for university classes in digital audio.
Bob and his wife (the best cupcake baker ever) live in Olathe, Kansas, with their dog Piper, where they host our wildly successful (or maybe just wild) AVANT pool party in the hottest days of the summer.
Edouard G. Charland
Throughout his 26-year career with AVANT ACOUSTICS, Ed has always taken great care of clients. He is hands-on with design, testing, and commissioning of audio-visual and sound systems for all types of facilities.
Ed has extensive experience with airport paging system projects, large and small, throughout the United States and overseas. He puts in a lot of nights working on the testing and configuration of airport paging systems; check with him if you want to know when the coffee shop opens at your favorite airport.
Ed has a Bachelor of Science in Electrical Engineering from Iowa State University.
Outside of the office, Ed loves to spend time with his wife and their two very busy children. You can often find him cheering for his favorite teams – Sporting Kansas City and the St. Louis Blues, or attending a concert or musical theatre production. Ed also enjoys playing the guitar, and is a music aficionado.
21c Museum Hotel – Kansas City, Missouri
John M. Hodgson, CTS-D
Technical Operations Manager
John performs a variety of services for clients. In addition to managing projects of all sizes, John performs the design and commissioning of audio-visual systems. He also provides architectural acoustics and noise control consultation. John is responsible for maintaining AVANT ACOUSTICS high standards for our work product and managing all technical staff. He has experience working with many types of facilities throughout the United States, including arenas, airports, performing arts centers, educational facilities, offices, and more. John has over 9 years of experience with the company.
John initially served as an intern at AVANT ACOUSTICS and joined the company full-time after completing his Bachelor of Science degree in Architectural Engineering at the University of Kansas in Lawrence in May of 2010. His education included an emphasis in architectural acoustics, noise control, and sound system design studying under the founder of AVANT ACOUSTICS, Bob Coffeen.
John is a member of the Acoustical Society of America (ASA), and is a Certified Technology Specialist (CTS).
Elizabeth K. Humburg
Marketing & Business Operations Manager
Elizabeth joined AVANT ACOUSTICS as the Marketing Manager, but soon after, also took over management of many of the other non-technical aspects of the business. She also contributes to overall strategy creation and execution.
Elizabeth has an MBA in Strategic Management & Marketing and a BA in English – both from the University of Kansas.
Outside of work, Elizabeth and her husband are kept so busy by their 5-year-old daughter and 2-year-old son that they no longer have any hobbies of their own.
Jill C. Elmers
Jill Elmers, Senior Associate of AVANT ACOUSTICS is actively involved in the design, testing, and commissioning of audio-visual and sound reinforcement systems for all types of facilities throughout the United States. Jill has over 23 years of project management, technical supervision, and hands-on field experience.
Jill’s role encompasses oversight of project design and design personnel. She is also involved in evaluating new audio-visual products, helping to provide our clients with the best value and newest technology in sound reinforcement and audio-visual system design.
Jill received a Bachelor of Science degree in Electrical Engineering from Valparaiso University in 1992.
Fort Bragg Air Force Base SOF Headquarters Facility – Fort Bragg AFB, North Carolina
Johnson County Central Resource Library – Overland Park, Kansas
Johnson County Crime Lab – Olathe, Kansas
MacDill Air Force Base SOCOM Headquarters – MacDill AFB, Florida
Emily G. Jaumard
Emily is actively involved in many aspects of acoustical design, including analysis and design of room acoustics, architectural and mechanical noise control, design of sound reinforcement systems, and acoustical computer modeling. She has experience with many types of facilities throughout the United States, including regional and international airports, educational facilities from elementary to university, offices, worship spaces and more. Emily has been with AVANT since 2008.
Prior to joining AVANT ACOUSTICS full-time, Emily was an intern with several architectural firms in the St. Louis metropolitan area, giving her valuable experience in understanding and communicating through architectural drawings and standards. She also has a Master of Architecture degree from the University of Kansas.
When not working, Emily likes to spend time with her husband and two daughters, hiking, quilting, and traveling. Whenever they go to a new place, Emily’s husband makes fun of her because she is always checking the room shape and finishes, and listening for reverberation and echoes.
Andrew J. VonFeldt
Andrew is actively involved in room acoustic design and evaluation, mechanical noise control, sound reinforcement system design, audio-visual systems design, control interface design, and system commissioning. He has experience with a wide variety of facility types across the United States, including airports, educational facilities, corporate spaces, convention centers, and more. Andrew has been with AVANT since 2012.
Before interning at AVANT ACOUSTICS and eventually joining full-time, Andrew worked for an audio-visual integrator where he gained practical experience in the design and installation of sound reinforcement and audio-visual systems. This practical experience and a lifelong passion for acoustics provide Andrew with a strong foundation that allows him to help clients to realize their unique goals.
Andrew received a Bachelor’s degree in Architectural Engineering with an emphasis in acoustics from Kansas State University in 2013. He is a member of the Acoustical Society of America (ASA).
David J. Wetzel
David joined AVANT ACOUSTICS in 2016, bringing with him years of experience in audio-visual systems design and integration in a wide variety of applications and environments. As an associate of AVANT ACOUSTICS, David has contributed to projects in the fields of education, performing arts, entertainment, government, and house of worship.
David is an alumni of the University of Missouri-Kansas City and the University of Kansas, where he studied audio engineering and history. He also has a strong background in live music, audio recording and post-production, and event production that better enable him to understand the diverse needs and applications of our clients.
Excelsior Springs Community Center – Excelsior Springs, Missouri
Johnson County Arts & Heritage Center – Overland Park, Kansas
Johnson County Board of County Commissioners – Johnson County, Kansas
Wichita Southeast High School – Wichita, Kansas