A concrete
contractor built on
direct oversight.
Manassas, Virginia–based. Led by 35+ years of commercial, industrial, and site concrete experience across Northern Virginia and the Washington, DC metro.
Founded by people who've
poured the projects.
SLM Concrete Corporation was founded in December 2025 and is led by a management team with more than 35 years of concrete construction experience across commercial, industrial, and public-sector work.
We specialize in self-performed concrete — footings, foundations, walls, tilt-up panels, slab-on-grade, post-tensioned and podium decks, and site flatwork. Every discipline a commercial project needs, run by crews that report to people directly involved in the work.
Our office is in Manassas, Virginia, and we serve general contractors, developers, and public agencies across Northern Virginia and the Washington, DC region — with secured projects worth more than $9.5M and an active pipeline above $21M.
Deliver high-quality, reliable concrete for commercial, industrial, and site projects — with a commitment to safety, precision, and client satisfaction.
Become a leading concrete contractor in Virginia and surrounding states — recognized for operational excellence, safety compliance, and long-term client relationships.
Mario Duarte
35+ years of experience in concrete construction.
SLM Concrete Company (1990–2013) — Vice President. Managed commercial and residential operations, project execution, field operations, and client relationships.
City Concrete Corp (2013–2026) — Vice President. Founded and led the commercial division, responsible for business development, operations, and large-scale project execution.
SLM Concrete Corporation (2025–Present) — Founder and President. Leads all operations, strategic growth, and client development.
Office & coordination.
Edite Pereira
- Manages administrative processes and documentation
- Prepares and submits bids and proposals
- Coordinates with clients and internal teams for project requirements
Janet Najera
- Handles accounts payable and vendor payments
- Supports financial tracking and cost control
- Assists with operational coordination and internal processes
Mayleen Palomino
- Oversees daily project coordination and logistics
- Tracks project progress, documentation, and reporting
- Supports operational efficiency and workflow organization
Commercial
Retail centers, office buildings, and mixed-use projects across Northern Virginia and the DC metro.
Industrial
Tilt-up warehouses, distribution centers, and high-tolerance industrial floor systems.
Public & Institutional
Public schools, fire stations, and municipal facilities delivered on accelerated public schedules.
Multifamily
Podium decks, post-tensioned slabs, and structural concrete for multi-unit residential.