AGM Container Controls, Inc. (AGM) has been a leader in the design and manufacturing of environmental control hardware for more than six decades. AGM evolved over the years from their parent company, Arizona Gear & Manufacturing, which, in 1955, was the first company to design breather valves for Hughes Aircraft’s missile container.

In 1960, Roger K. Stewart and Joyce C. Stewart, of Los Angeles, California, owners of Aztec, Inc. began representing Arizona Gear nationally. In 1969, Roger arranged for Arizona Gear to buy Cargo-Ties, Inc., a small Wisconsin company Aztec had been representing since 1968. With this new acquisition, the manufacturing of tie downs was relocated to Arizona Gear’s headquarters in Tucson, Arizona.

In 1970, Roger and Joyce moved to Tucson, Arizona, to take over Arizona Gear’s military packaging and tie downs operations, thus forming a new company called “AGM Cargo-Ties, Inc.” During the 1970s, the company gradually expanded its business and product offerings, as well as constructing a new office building.

During the 1980s, AGM achieved its 10th Anniversary, expanded the office building and added a new warehouse, and in 1982, the company was renamed to “AGM Container Controls, Inc. (AGM)” to reflect more accurately the range of product offerings. In 1988, AGM became an Employee Stock Ownership Company (ESOP), and the following year AGM employees became owners through the ESOP plan.

In the 1990s, Joyce C. Stewart became President and Roger K. Stewart was named Chairman of the Board. AGM ventured into manufacturing portable wheelchair lifts, and formed a division of AGM called Ascension. In 1998, AGM was expanded once more to include a new building for welding and assembly of the wheelchair lift, as well as an enlarged machine shop.

By 2001, Roger K. Stewart and Joyce C. Stewart officially stepped away from the daily operations of AGM, and their son Howard N. Stewart was named President and Chairman of the Board of AGM.

In 2002, AGM became certified to ISO 9001:2000 standards, and has continually maintained such status. In late 2014, a momentous occasion occurred, when AGM’s quality management system became ISO 9001:2008/AS9100C certified, the foremost quality standard for companies in the worldwide aerospace industry. AGM’s AS9100C quality management system certification was a validation of AGM’s 44-year commitment to quality, while further cementing AGM’s place in the industry as a trustworthy supplier of products that ultimately affect the safety and livelihood of warfighters and other aerospace personnel. AGM's continued commitment to quality was most recently evident when AGM's quality system was certified to AS9100D.

Over the past decades, AGM has continually increased business through new product development and distribution partnerships, which enable AGM to supply solutions to a variety of industries. AGM has also been recognized for numerous company and individual achievement awards, both at a local and national level. In 2009, AGM was recognized with the national U.S. Chamber of Commerce’s “America’s Best Small Business of the Year” award.

Arizona Gear & Manufacturing Joyce and Roger Stewart expanding AGM Cargo-Ties, Inc. Front of AGM Container Controls headquarters ESOP


AGM's Management Team


Howard Stewart CEO

Howard N. Stewart, President/CEO

Born in Hollywood, California, Howard is the youngest of three children and the only son of Joyce and Roger Stewart, AGM's Founders. His parents moved the family to Tucson in 1970 to start AGM. Howard started working at AGM in 1971, during his teenage years.

In 1981, he received his Bachelors in Political Science from Principia College in Elsah, Illinois. He then interned for the Christian Science Monitor in Boston before joining the Peace Corps in Kenya. Thereafter, he became a stockbroker for Dean-Witter/Reynolds in Tucson. In 1984, Howard opened two ice cream stores, one in Tucson and another in Tempe. He successfully ran these stores for five years, as exemplified by the fact that his Tucson store was voted “Best Ice Cream in Tucson” all five years that this store was open.

Howard began his career as AGM’s Purchasing Assistant in 1989. In 1990, he was promoted to Sales Engineer and two years later he was promoted to Vice President of Marketing. In 1997, he was named Executive Vice President. In 2000, he was named AGM's President/CEO.

Howard was married to Beth Nebel Stewart, his wife of 18 years, from 1987 to 2005. Beth passed away in 2005. Beth also worked at AGM from 1998 to 2004.

Howard has two sons, Clayton and Russell.

Howard is an avid cyclist and enjoys participating in road bike races and mountain bike activities. He also enjoys hiking, and climbed Mt. Kilimanjaro, Tanzania, with friends in 2011. In addition, in 2013, he was recognized as the “Top Silver Male” at the Southern Arizona “Cactus Classic.” Finally, he and his dance partner, Kristé Belt, provided a special guest performance at the American Heart and Stroke Association's "Heart and Stroke Ball," on February 16, 2013.

Howard was an honoree at the 2015 American Heart Association Heart & Stroke Ball, where he talked about his personal story of surviving a heart attack. He'll be the 2019 Heart Ball Chair.

Howard has been serving as the Tocqueville Society Chair for the United Way of Tucson and Southern Arizona Campaign Cabinet since 2015. He is also serving as a Member of the Board of Directors for the Tucson Metro Chamber, as well as a member of the President's Council for San Miguel High School.

To read Howard's full bio, click here.

Howard is available for speaking engagements in community organizations. If you're interested in having Howard speak at your event, please e-mail Tara Turek at tturek@agmcontainer.com.


Tom Christie Information Technology

Tom Christie, Chief Financial Officer

Tom Christie received a Bachelor’s degree in Mechanical Engineering from the University of Arizona, a Masters of Divinity from The Master’s Seminary, and received his Masters of Business Administration in 2014.

Tom started at AGM in 2008 as a Manufacturing Engineer. Since then, he has also worked in Ascension Design Engineering, and took a lead role in the development of AGM’s ERP System implementation in 2011.

On January 1, 2013, Tom was promoted to Information Technology Manager where he oversaw AGM’s computer network, ERP systems, and website technology. In 2015, Tom joined AGM's Board of Directors and assumed the role of HR Manager. In July 2016, Tom was promoted to Chief Financial Officer.

Tom is married and has four young children under five. His pastimes include board games and serving his church.


Jim McCorry Business Development

Jim McCorry, Director of Business Development

Jim McCorry was born in Chicago, IL, and his family moved to Arizona in 1970.

Jim started at AGM in 1981 as a Shipping Clerk and has held a number of positions in his 30+ years with the company. Jim became AGM’s Sales Manager in 2000 and joined the AGM Board of Directors in 2001. He assumed his current role as Director of Business Development in 2008.

Jim is married and has two adult children. His pastimes include hiking and golfing.


Eric Zuercher Engineering

Eric Zuercher, Vice President of Engineering

Eric Zuercher received his Bachelors and Masters degrees in Mechanical Engineering from the University of Arizona.

Eric started at AGM in 1997 as a Design Engineer for the Ascension Product line. He became Senior Design Engineer in 2002, and expanded his focus to the AGM Product lines in 2004.  He joined AGM’s Board of Directors in 2005 and assumed the role of Director of Design Engineering in 2006. In 2014, Eric was promoted to his current role as Vice President of Engineering.

Eric is married and has four young children. His pastimes include hiking, backpacking, and bicycling.


Pat Lane Engineering

Pat Lane, Design Engineering Manager

Pat Lane received his Bachelor’s degree in Mechanical Engineering from the University of Arizona.

Pat started at AGM in 1999 as a Design Engineer for the AGM Product line. He became Senior Design Engineer in 2002. He joined AGM’s Board of Directors in 2005 and assumed his current role as AGM Design Engineering Manager in 2010.

Pat is married and has two daughters. His pastimes include volleyball, hiking, and bicycling.


Ron Corbin Operations

Ron Corbin, Operations Manager

Ron Corbin was born in Goodyear, AZ.

Ron started at AGM in 1980 as machinist/production worker and held many positions during his 33 years with the company. He was Purchasing Manager for 10 years before becoming AGM’s Sales Manager in 2008. Ron assumed his current position as Operations Manager in 2012.

Ron is married and has two adult children. He is a car enthusiast and also enjoys hiking, camping, and boating.


Blake Koomar Sales

Blake Koomar, Sales Manager

Blake Koomar has worked continuously in the accessibility market since graduating from the University of Arizona with a degree in Mechanical Engineering. Prior to holding the position of Sales Manager over the Ascension wheelchair lift product line, Blake was one of the key Engineers who worked on the design of the Ascension Protégé wheelchair lift.

Blake’s wide product knowledge and superb customer service skills have helped Ascension earn an unparalleled reputation as one of world’s foremost ground-breaking companies in accessibility.

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