More than fifty years of practice, a founding heritage inside Missouri DNR, and a commitment to senior-level service on every project — nationwide.
Shell Engineering & Associates was founded in 1975 by Harvey Shell — who spent years heading Missouri DNR’s first Air Quality Program before entering private practice. That background gave the firm something no other environmental consultant could claim: an insider’s understanding of the regulations, the regulators, and the processes that shape environmental compliance.
For over five decades, that foundation has been the firm’s defining advantage. We don’t just know the rules — we helped write them.
Today Shell Engineering is led by Charles Shell, who has carried the firm’s tradition of senior-level expertise and direct client relationships forward. At Shell Engineering, you work with experienced professionals — not junior staff. Every project, regardless of size or complexity, receives the same careful, personal attention.
That consistency has earned Shell Engineering long-term relationships with clients across a wide range of industries — manufacturing, mining and natural resources, energy, municipal, and more.
Environmental compliance isn’t just paperwork — it’s your license to operate. We take that seriously. Our goal on every engagement is to give you clear, actionable guidance so you can make confident decisions, stay ahead of deadlines, and focus on running your facility.
We offer one-stop service across air quality, water compliance, meteorological monitoring, ambient air monitoring, and dispersion modeling — which means fewer handoffs, less duplication, and a single team that understands the full picture of your compliance obligations.
We are based in Columbia, Missouri, and have been part of this community since our founding. From here we serve regulated facilities across the country — and we’re always just a phone call away.