John Grennon
John Grennon
Director of Business Development, LAN-TEL Communications, Inc.John Grennon is the Director of Business Development at LAN-TEL Communications, Inc. Previously John Grennon was the Operations Supervisor at Massachusetts General Hospital.
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Situated north of Boston, the city of Lawrence is a densely populated area of over 79,000 residents. It’s known for being a manufacturing hub. When looking to address crime, the community found...
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