Marinex Construction Inc.
North Charleston, SC
- UEI
- NLNZS42SH3D6
- CAGE
- 4NS08
- Primary NAICS
- 237990 Other Heavy and Civil Engineering Construction
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Other
- SAM.gov registration date
- Physical address
- 1903 Pittsburgh Ave, North Charleston, SC 29405, USA
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $25,997,941 |
| FY2025 | $18,722,579 |
| FY2024 | $30,593,968 |
| FY2023 | $64,855,379 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $25,997,941 |
Contract vehicles
No active vehicles.
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Southwind Construction Corp. | Evansville, MN | 237990 Other Heavy and Civil Engineering Construction |
| Gator Dredging | Largo, FL | 237990 Other Heavy and Civil Engineering Construction |
| H & L Contracting LLC | Bay Shore, NY | 238990 All Other Specialty Trade Contractors |
| Cottrell Contracting Corporation | Chesapeake, VA | 237990 Other Heavy and Civil Engineering Construction |
| Southern Dredging Co Inc. | Charleston, SC | 237990 Other Heavy and Civil Engineering Construction |
About the company
Marinex Construction Inc., a for-profit Subchapter S Corporation based in North Charleston, South Carolina, operates as a prime contractor exclusively on full-and-open federal dredging and coastal infrastructure projects, with no subcontract footprint and no SBA set-aside participation. The vendor's 69 prime awards carry a combined potential value of $1.65 billion and are concentrated entirely within NAICS 237990 (Other Heavy and Civil Engineering Construction), with performance spanning the southeastern United States from North Carolina through Florida and Georgia.
Marinex's customer base is singularly concentrated: the U.S. Army Corps of Engineers accounts for 97% of awards across five district-level organizations, with the Jacksonville District anchoring the portfolio at $1.01 billion in potential value (11 awards) and the Savannah District contributing $334.8 million across 40 awards. The Savannah District alone represents the vendor's deepest engagement, spanning repeated fiscal-year maintenance dredging contracts for the Savannah Inner Harbor, including a $28.4 million FY24 award (July 2024, completion October 2025) and a $36.4 million FY25 award (September 2025, completion November 2026). The Jacksonville District's larger dollar share reflects a single major vehicle: the Indefinite Delivery Contract W912HN09D0001, which has generated 11 task orders totaling $14.1 million combined potential value. Savannah and Jacksonville districts together account for 98% of combined potential value across all awards.
Marinex's capability portfolio centers on hydraulic cutterhead dredging, material placement in confined upland disposal areas, beach fill and nourishment operations, and navigational channel maintenance. Recent work includes the $19.1 million Cedar Hammock Range bend widener expansion at Brunswick Harbor, Georgia (September 2026, completion May 2028); the FY25 Savannah Inner Harbor maintenance dredging project ($36.4 million, September 2025); a $19.1 million beach fill and quantity reconciliation contract for Nassau County, Florida (April 2025, completion October 2025); and Morehead City Harbor maintenance dredging in North Carolina ($16.3 million, August 2023). All work involves removal of hundreds of thousands to four million cubic yards of sediment, environmental compliance with protected species restrictions, and material-placement operations across multiple confined disposal sites.
Activity has been episodic rather than consistently high: one award in 2022, four in 2023, one in 2024, two in 2025, and one in September 2026. The recompete cliff in the next twenty-four months includes two awards with combined potential value of $55.6 million. Marinex operates exclusively under full-and-open, non-set-aside procurement, with no IDV or GWAC presence and no subcontractor relationships in the current portfolio. The vendor's award pattern reflects specialized expertise in large-scale dredging operations and coastal storm risk management aligned directly to the Corps of Engineers' Civil Works mission in the South Atlantic region.
Quick answers
Is Marinex Construction Inc. registered in SAM.gov?
Yes. Marinex Construction Inc.'s SAM.gov registration is active through January 29, 2027.
Which contract vehicles does Marinex Construction Inc. hold?
Marinex Construction Inc. holds a place on 2 federal contract vehicles, including SAD Dredging and Shore Protection 2019 and USACE SAD Miscellaneous Dredging MATOC 2012-2017.
How much has Marinex Construction Inc. received in federal contracts?
Federal contracts obligated $18,722,579 to Marinex Construction Inc. in fiscal year 2025 and $140,169,867 in fiscal years 2023 through 2027.
How does Marinex Construction Inc. rank among federal contractors?
Marinex Construction Inc. ranked #11 in PSC Z1KF, #63 in PSC Z1 and #83 in NAICS 2379 in FY2025.
What is Marinex Construction Inc.'s most recent federal award?
Marinex Construction Inc.'s most recent federal contract award is The scope of work includes the expansion of the cedar hammock range bend widener located between stations 20+300 and… (W912HN26CA025), from ENDIST Savannah (USACE), on September 3, 2026.
On GovTribe
See Marinex Construction Inc.'s full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors