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Sussex Development Corporation is a privately held corporation, with hundreds of years combined construction experience, spread among a close-knit Team of professionals.


ASHE Membership & Certification

Sussex Development Corporation is dedicated to continuing our education and finding ways to better serve our clients. As part of these efforts in the spring of 2008, Sussex became a member of ASHE, American Society for Healthcare Engineering. ASHE’s mission is “Dedicated to optimizing the healthcare physical environment.”

Our goal is for 100% of our superintendents to maintain their ASHE Certifications. To learn more about ASHE, please visit their site at

CCIFP Certifications

LEEANN OLD of Sussex Development Corporation Appointed to Controller and Achieves “Certified Construction Industry Financial Professional” Designation

LEED Certifications

DANIELLE HANGEN of Sussex Development Corporation Achieves LEED Green Associate Designation