LJB Inc.
Miamisburg, OH
- UEI
- SU21EFZDJ656
- CAGE
- 1KPW3
- Primary NAICS
- 541330 Engineering Services
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
-
- 236210 Industrial Building Construction
- 236220 Commercial and Institutional Building Construction
- 237110 Water and Sewer Line and Related Structures Construction
- 238910 Site Preparation Contractors
- 238990 All Other Specialty Trade Contractors
- 332323 Ornamental and Architectural Metal Work Manufacturing
- 333923 Overhead Traveling Crane, Hoist, and Monorail System Manufacturing
- 531120 Lessors of Nonresidential Buildings (except Miniwarehouses)
Show all 19
- 541310 Architectural Services
- 541320 Landscape Architectural Services
- 541350 Building Inspection Services
- 541370 Surveying and Mapping (except Geophysical) Services
- 541611 Administrative Management and General Management Consulting Services
- 541620 Environmental Consulting Services
- 541690 Other Scientific and Technical Consulting Services
- 541990 All Other Professional, Scientific, and Technical Services
- 562910 Remediation Services
- 611430 Professional and Management Development Training
- 624230 Emergency and Other Relief Services
- SAM.gov registration date
- Physical address
- 2500 Newmark Dr, Miamisburg, OH 45342, USA
- Website
- ljbinc.com
- Founded
- 1966
- Employees
- 51-250
- Estimated annual revenue
- $10M-$50M
- Industry
-
- Industrials
- Capital Goods
- Construction & Engineering
- Civil Engineering
- SIC code
- 87 Engineering & Management Services
- Profiles
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 | $326,675 |
| FY2025 | $179,930 |
| FY2024 | $218,360 |
| FY2023 | $361,108 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Smithsonian Institution | $237,475 | |
| 2 | Washington Headquarters Service | $88,700 | |
| 3 | Missile Defense Agency | $500 |
Contract vehicles
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Contract subawards
| Prime contractor | Prime award | Amount | Awarded |
|---|---|---|---|
| Gana-A'yoo Construction Services JV, LLC | FA860125F0204 | $207,760 | |
| Gana-A'yoo Construction Services JV, LLC | FA860124F0132 | $48,600 |
Grant subawards
| Prime recipient | Prime award | Amount | Awarded |
|---|---|---|---|
| Not on record | B-23-CP-ME-0764 | $82,777 | |
| Not on record | B-23-CP-ME-0749 | $126,725 |
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Diversified Fall Protection | Westlake, OH | 332999 All Other Miscellaneous Fabricated Metal Product Manufacturing |
| Shine On Group, Inc. | Chicago, IL | 237990 Other Heavy and Civil Engineering Construction |
| American Anchor, Inc. | Taunton, MA | 541350 Building Inspection Services |
| Gravitec Systems Inc. | Poulsbo, WA | 339920 Sporting and Athletic Goods Manufacturing |
| Flexible Lifeline Systems Inc. | Buffalo, NY | 332999 All Other Miscellaneous Fabricated Metal Product Manufacturing |
About the company
LJB Inc., a Miamisburg, Ohio-based civil and structural engineering firm, delivers fall protection system design, installation, inspection, certification, and competent person training services to federal facilities as a full-and-open prime contractor (97% of recent awards) with no SBA certifications. The firm has maintained a federal presence since 1990 and competes without set-aside designations across a diverse customer base spanning defense, civilian agencies, and cultural institutions.
LJB's customer concentration centers on Air Force maintenance operations and Pentagon facilities. The top five funding agencies account for 53% of recent awards by count and 83% of combined potential value: the Department of the Air Force Materiel Command (19 awards, $10.1 million), DOD Washington Headquarters Service (13 awards, $11.9 million), the Smithsonian Institution (21 awards, $2.5 million), GSA Federal Acquisition Service (3 awards, $13.2 million), and the Department of the Air Force Air Combat Command (4 awards, $888 thousand). The two rankings diverge meaningfully—GSA's potential-value share is propped up by a single $151 billion Missile Defense Agency SHIELD IDIQ awarded January 21, 2026, where LJB holds a seat but has placed only one nominal $500 initial order. Operational concentration sits with Smithsonian facilities work (fall protection certification and installation across the National Museum of American History, Renwick Gallery, and Cooper Hewitt) and Pentagon roof systems maintenance under a recently awarded $5.5 million single-award IDC to Washington Headquarters Service.
LJB operates primarily through delivery orders against three active Indefinite Delivery Contracts: the Air Force Materiel Command contract FA860109D0005 (26 task orders, $4.1 million combined potential value), the Air Force contract F17CC10017 (20 task orders, $2.5 million), and the Air Force contract F3360103D0018 (16 task orders, $1.3 million), alongside a GSA Multiple Award Schedule Blanket Purchase Agreement valued at $4.78 million under Engineering Services (NAICS 541330). Recent representative work includes a $470,920 delivery order from Washington Headquarters Service for roof fall protection services (awarded September 23, 2026, completion September 2031), a $128.8 thousand Smithsonian order for design and installation of a rolling gantry on the National Museum of American History roof (April 2026), and a $24.5 thousand Naval Sea Systems Command task order for competent person fall protection training at San Diego (September 2025). Service scope concentrates on NAICS 541330 (Engineering Services, 56 awards) and 541410 (Architectural Services, 45 awards), with PSC A&E codes dominating the portfolio (39 awards for General Landscaping and Design, 19 for Construction—Museums and Exhibition Buildings).
Activity has remained episodic but stable—five awards in 2022, eight in 2023, three in 2024, five in 2025, and eight in 2026 year-to-date—with relatively low recompete pressure; only 18 awards (combined potential value $1.7 million) reach ultimate completion within the next twenty-four months. LJB operates as a self-delivery contractor with minimal subcontractor footprint on prime work; the vendor subcontracts to Gana-A'yoo Construction Services JV on two construction-related sub-awards and serves as a sub-recipient on two federal grants for civil engineering design and permitting services. SCI-reportable invoiced revenue (service contracts above $150,000 threshold) totaled $584 thousand across FY2022–FY2025, with $582 thousand in FY2024 supporting 1.3 FTEs and minimal activity in FY2025 ($2 thousand, 0.9 FTEs). Government-paid hourly rates on SCI-reportable prime contracts ran at a median of $219.74 per hour with no sub-hour engagement recorded, reflecting direct labor delivery on federal services contracts captured in the SCI dataset.
SBA capabilities narrative
Founded in 1966, LJB Inc. is an employee-owned consulting firm that provides civil and structural engineering, as well as geospatial, safety, health and environmental services. Its diverse expertise, client base and geographies have enabled LJB to serve clients in all 50 U.S. states. LJB's skilled staff hold professional engineering licenses in all 50 states, Washington, D.C., several Canadian provinces and Guam.
Quick answers
Is LJB Inc. registered in SAM.gov?
Yes. LJB Inc.'s SAM.gov registration is active through February 27, 2027.
What is LJB Inc.'s CAGE code?
LJB Inc.'s CAGE code is 1KPW3, and its Unique Entity ID (UEI) is SU21EFZDJ656.
Which contract vehicles does LJB Inc. hold?
LJB Inc. holds a place on 3 federal contract vehicles, including MAS, SHIELD and PSS.
How much has LJB Inc. received in federal contracts?
Federal contracts obligated $179,930 to LJB Inc. in fiscal year 2025 and $1,086,073 in fiscal years 2023 through 2027.
How does LJB Inc. rank among federal contractors?
LJB Inc. ranked #29 in PSC C1JA in FY2025.
What is LJB Inc.'s most recent federal award?
LJB Inc.'s most recent federal contract award is Roof fall protection services (HQ003426FE145), from Washington Headquarters Service, on September 23, 2026.
On GovTribe
See LJB Inc.'s full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors