About Manna Supply, Inc.

Manna Supply, Inc. is a Philadelphia-based, award-winning wholesale stocking distributor serving the construction industry with a wide range of supply products and equipment. We specialize in Electrical, Mechanical, Plumbing, Fire Suppression, Data Communications, Safety/Security, and General Construction materials — proudly supporting projects across multiple trades and divisions.

Founded in 1993 by Elaine Prince, Manna Supply was built on the vision of empowering certified small businesses to participate in government contracting. Elaine’s deep expertise in electrical contracting and communications infrastructure laid the foundation for our growth and reputation. Over the years, we’ve expanded our product lines, certifications, and partnerships across industries and state lines.

Today, Manna Supply is proudly owned and operated by sisters Shannon Martin and Amanda MacSweeney, who bring fresh energy and a shared commitment to continuing Elaine’s legacy. Shannon graduated from Clemson University (go Tigers!) with a degree in business and a focus on sales, while Amanda earned her business degree from The College of Charleston with a focus on operations. Together, they bring a dynamic blend of experience in sales, marketing, operations, and customer service — all rooted in a passion for delivering value and building lasting relationships.

As women leading in a traditionally male-dominated industry, Shannon and Amanda are deeply committed to opening doors for the next generation of women in construction. Through mentorship, visibility, and advocacy, they aim to inspire young women to explore careers in the trades and see themselves as future leaders in the field.

Our headquarters and 10,000 sq ft warehouse are located in the heart of Philadelphia, PA.

What We Offer

We supply equipment across the following divisions:

• Division 10: Toilet Partitions, Lockers, Fire Protection Specialties, Visual Display Boards, Wall Protection
• Division 21: Fire Suppression
• Division 23: Mechanical/HVAC
• Division 25: Integrated Automation
• Division 26: Electrical (Switchgear, Lighting, Cable, Conduit, and more)
• Division 27: Data and Communications
• Division 28: Safety & Security

Certifications

We are proudly certified as:

• MBE/WBE: PA, NJ, DE, NYC, NYS, MD, VA
• DBE: PA, NJ, DE, MD, VA
• SDB: PA
• LBE: Philly

Because juggling five vendors — or fifty — chasing quotes, and decoding government procurement rules isn’t anyone’s idea of a good time.

At Manna Supply, Inc., we’re your one-stop shop for construction supplies — from Electrical and Mechanical to Fire Suppression and Specialty Items. We offer a diversified product range that saves you time, energy, and sanity. No more quote chaos. No more supply chain scavenger hunts.

We simplify the government contracting process like pros. Our team handles every phase — accurate take-offs, Bill of Material prep, estimating, project management, logistics coordination, and follow-through to completion. We’re your behind-the-scenes project partner, powered by hustle and grit, and always ready to roll up our sleeves and get it done.

Our 10,000 sq ft warehouse in Philadelphia gives us the space to store, stage, and re-deliver materials on your schedule — in our own truck, no less. We keep things moving so you can keep building.

Oh — and we’re proud Philadelphia Eagles fans. So if you hear us yell “Go Birds!” during a site visit, just know it’s part of the culture.

Let Manna Supply take the heavy lifting off your plate — so you can focus on building what matters.