About Us


World Congress Interpretation Systems, Inc. is a leading provider of conference microphones, language interpretation solutions and related services for events worldwide. With proven expertise in high-profile international congresses (including the G20 Summit and the IMF and World Bank annual meetings), WCIS is the pioneer in conference solutions around the world.
We partner with our clients to offer world class event systems including pre-production planning, bids, setup/strike labor and onsite technical support during conference events.
Equipped with one of the largest rental inventories of high-end products and a professional team of experts, WCIS has expanded its global presence across the world. A well-established partner network stretches even further to deliver successful event solutions to all corners of the world with a deepening footprint in Latin America and South East Asia.
The WCIS Team is an energetic and enthusiastic one, consisting of a multilingual staff with many years of experience in the audiovisual and language services industries.

Who We Are

John Holliday is the CEO and founder of World Congress Interpretation Systems, Inc., an interpretation services company, based in the Washington DC metro area. In 1997, John Holliday, an accomplished business leader, established a company that could not only meet the interpretation needs of businesses, but also one that would excel beyond the highest levels of professionalism and integrity in the industry. John graduated with a bachelor’s degree from the University of Montana in 1968. Before starting his own company, John utilized the skills and experiences he acquired both in college and in his professional career by establishing World Interpretation Services, Inc. Since then, the company has continued to evolve and thrive into a reputable and growing interpretation company in the Washington DC metro area.

How Can WCIS Help You?

Within the business events industry, the languages in greatest demand are: French, Spanish, Portuguese, Russian, Japanese, Korean and Mandarin. We can source conference interpreters and translators in all of these languages, as well as many other European and Asian languages.
As a reputable specialist conference language service provider, we pride ourselves on over 20 years of dedicated service in bridging the gap of communication linking people of different nationalities around the globe. Conference Interpreting, also known as Simultaneous Interpreting, is an extremely complex art to master. We always place a premium on excellence of delivery and engage professional linguists whose skills have been honed through years of experience, who command a vast repository of information and knowledge, both linguistic and extra linguistic, and have a proven capacity to quickly grasp the unique and complex discourse of each and every one of the many varied assignments through dedicated pre-conference research and study.

We are here to help you

Professional Translation Services to help you have a Global Reach. Work with an experienced Translation Company. If you have any questions or would like to schedule a free consultation for your event interpretation needs, please contact us at:


5112 Pegasus Ct., Suite W
Frederick, MD 21703