about us
A Company You Can Trust
G4 Energy was founded with a simple but powerful vision: to bring personalized care and logistical innovation to every link in the fuel supply chain. Based in Denver, Colorado, we bring over 100 years of versatile experience to the table, operating at the intersection of steadfast regional service and world-class trading. Our mission is to serve companies of every size, from local fleets to major industrial conglomerates, with reliability, responsiveness, and transparency. It’s our firm belief that fuel logistics should be as effective and streamlined as the industries they power.
We are also proud to be a certified Minority-Owned Business. This certification reflects our values and strengthens our ability to partner with public agencies and diversity-focused institutions. G4 Energy works tirelessly to drive meaningful growth in the energy sector while creating opportunities for underrepresented communities.
Meet Our Leadership Team
Kiefer Grossi
With extensive experience in commodity exchanges and structured energy deals, Kiefer leads G4’s trading operations with an eye toward market opportunities, fostering long-term value for our partners.
Austin Weakland
Austin oversees refined product strategy and customer programs, combining deep product knowledge with an emphasis on reliable service and customer satisfaction.
Our Commitment To Safety
To us, “safety first” isn’t just a rule of thumb. It’s the key to our operational excellence and internal procedures. From our terminals to truck fleets to tank installations and fueling programs, every aspect of our business is built on best-in-class safety protocols. We maintain strict compliance with environmental and regulatory standards while investing in continuous training to protect our team members and our customers.
Our fuel supply services are available throughout Colorado. Thanks to our vertically integrated network, we’re able to move fuel quickly and efficiently. No matter what assistance you need, G4 Energy always delivers.
At G4 Energy, we provide comprehensive fuel solutions tailored to both everyday and nationwide operations. We supply premium diesel, gasoline, and intermediates across an expansive distribution network backed by rail, pipeline, and inhouse trucking assets. Our services also extend beyond supply concerns, ranging from tank rentals to fueling equipment, emergency programs, and structured procurement for institutional clients. G4 Energy is your dedicated supplier of sophisticated and scalable fueling options with a personal touch.