Leonard Jackson Associates

What Leonard Jackson Associates does

Leonard Jackson Associates PE PLLC (LJA) is a privately-held, multi-discipline small business civil engineering firm founded in 1973 by Leonard Jackson, PE, and headquartered in Pomona, New York with a branch office in Vienna, Virginia. The firm is organized as a Professional Limited Liability Company (PLLC) under New York law and operates with 11–50 employees. Its core technical offering centers on water-resources and floodplain engineering, anchored by Flood Insurance Study (FIS) and Digital Flood Insurance Rate Map (DFIRM) production in support of FEMA's National Flood Insurance Program (NFIP). Adjacent service lines include site development design, environmental engineering, hydrologic and hydraulic (H&H) modeling, levee system certification under 44 CFR 65.10, Letter of Map Change (LOMC) applications, Community Rating System assistance, coastal and tidal analysis, dam analysis, ice jam analysis, and highway/road improvement projects.

The firm's technical stack combines industry-standard engineering software — HEC-RAS, HEC-HMS, HEC-1, HEC-GeoRAS, CHAMP, WHAFIS, AutoCAD Civil 3D, and GIS platforms — applied to riverine, coastal, and tidal hydrology, floodplain mapping, and regulatory compliance workflows. Customer concentration is heavily weighted toward federal agencies (FEMA, US Army Corps of Engineers, United States Military Academy at West Point, US Postal Service), complemented by state and local government agencies and private developers across New York, New Jersey, Connecticut, Pennsylvania, and Puerto Rico.

Revenue is generated through professional-services fees on a project-by-project basis, including multi-year IDIQ federal contracts. The firm is bootstrapped with no disclosed external institutional capital, no parent company, no M&A history, and no funding events, and is led by founder-President Leonard Jackson, PE, supported by a technical bench that includes licensed Professional Engineers (PE) and Certified Floodplain Managers (CFM). Distribution is conducted entirely through direct client engagement via the two physical offices, with marketing limited to the company website.

Name

Leonard Jackson Associates

Legal name

Leonard Jackson Associates PE PLLC

Website

https://leonardjackson.net

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

11–50 employees

Short description

Leonard Jackson Associates PE PLLC is a privately-held civil engineering firm founded in 1973 that provides FEMA NFIP-focused flood insurance studies, hydrologic and hydraulic modeling, site development, environmental, and LOMC services to federal, state, and local agencies and private developers in the Northeastern US.

Ownership category

akta.pro rank

Product category

Water Resources Engineering Services

NAICS

Engineering Services (54133), Environmental Consulting Services (541620), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industries

Flood Risk Modeling, Mapping & Forecasting (Hydrology/Hydraulics, Digital Twins) (EUANAEAH), Water Quality & Watershed/Hydrologic Modeling (SWMM/HEC-RAS, Flood/Runoff/Nutrient) (EUAHAKAF), Water, Wastewater & Stormwater Compliance (BPAHAJAJ)

Keywords

• Civil engineering services
• Floodplain mapping
• Hydraulic analysis
• Levee certification
• Site development engineering

Headquarters

HQ city

Pomona

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Engineering Consulting Services: Professional engineering consulting services including site development, environmental analysis, flood insurance studies, LOMC applications, levee certification, and construction management. Services are provided on a project basis to federal, state, local government agencies and private sector clients.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels1 record

Core offering

Leonard Jackson Associates (LJA) is a multi-discipline civil engineering firm providing water resources and site development consulting services. Core offerings include Flood Insurance Study (FIS) and DFIRM production, hydrologic and hydraulic analysis, LOMC applications, levee certification, environmental engineering, flood control design, site development, and construction management primarily in support of FEMA's National Flood Insurance Program for federal, state, local, and private sector clients.

Product overview

Leonard Jackson Associates (LJA) is a multi-discipline engineering firm offering a comprehensive suite of water resources and civil engineering services. The company's core offering centers on Flood Insurance Study (FIS) and DFIRM Production, supplemented by Site Development, Environmental Services, Flood Control Design, Levee System Certification, and LOMC Application services. LJA uses specialized engineering software including GIS, HEC-RAS, HEC-HMS, and AutoCAD Civil 3D to deliver hydrologic and hydraulic analyses, floodplain mapping, and regulatory compliance services primarily for FEMA's National Flood Insurance Program (NFIP), serving federal agencies, state and local governments, and private developers across New York, New Jersey, and Connecticut.

Differentiator

Problem solved

Functional benefit

Products and services

• Site Development Services Site review, design, and technical advice on geotechnical, grading and drainage components of construction projects, including layout, grading, drainage, sewer, water system, permitting, and landscaping for residential and commercial projects. Target customers: private developers, state and local agencies, and federal installations.
• Environmental Services Comprehensive environmental engineering services including water supply system design, sewage collection, pump station and force main design, water supply treatment, storage and distribution systems, and securing permits from NYSDEC and NJDEP. Target customers: state and local governments and private developers.
• FIS & DFIRM Production Flood Insurance Study and Digital Flood Insurance Rate Map production services including scoping, field survey, levee investigation, digital terrain and LiDAR topographic mapping, flood hazard engineering and mapping, DFIRM production, and post-preliminary processing in support of FEMA's NFIP program. Target customers: FEMA and other federal agencies, state and local communities.
• Preliminary FIRM/FIS Review and Appeal Process Review and appeal services for preliminary maps issued by FEMA communities, checking accuracy and completeness of Flood Insurance Study data and preliminary map panels within the 90-day appeal period. Target customers: state and local communities and private developers.
• LOMC Services (Letter of Map Change) Application preparation services for Letters of Map Amendment (LOMA), Letters of Map Revisions (LOMR), and Conditional Letter of Map Revision (CLOMR), including Elevation Certificate preparation and electronic LOMA submission. Target customers: private property owners and developers seeking property removal from SFHA.
• Community Rating System Assistance Assistance for communities participating in NFIP's Community Rating System voluntary incentive program, helping increase ratings to achieve flood insurance premium discounts through activities in Public Information, Mapping and Regulations, Flood Damage Reduction, and Flood Preparedness categories. Target customers: state and local communities enrolled in NFIP.
• Levee System Certification Professional engineering services for levee certification in compliance with FEMA requirements, including freeboard documentation, opening closures, embankment protection, stability analysis, interior drainage analysis, and certified as-built plans per 44 CFR 65.10. Target customers: federal, state, and local levee owners and sponsors.
• Flood Control Design Flood control master plans, floodplain information reports, and detailed flood control project reports involving hydrology and hydraulic analyses, HEC hydraulic modeling, and structural improvements for major watercourses. Target customers: federal, state, and local government agencies and USACE.
• Dam Analysis & Reconstruction Dam break analyses and reconstruction services to identify and assess multiple flood risk situations within FEMA Region II, including alternative solutions development and evaluation. Target customers: state and local dam owners, FEMA Region II stakeholders.
• Construction & Maintenance Services Construction management and maintenance services for private clients and local/state agencies, including pipe, channel, and culvert systems, building alterations, utility systems, and infrastructure improvements. Target customers: private clients and local and state agencies.
• Highway & Road Improvement Projects Roadway rehabilitation services including drainage solutions for streets to meet water quality and quantity requirements, and road improvement projects throughout New York and Connecticut. Target customers: state DOTs and local transportation/public works departments.
• Coastal and Tidal Analysis Complex coastal and tidal analyses including tidal analysis of water body elevations, diffuser dilution and dispersion, cooling water intake and outlet analysis, hydrographic surveys, tidal surge analysis, and coastal rehabilitation projects. Target customers: federal, state, and private coastal infrastructure clients.
• Ice Jam Analysis Ice jam analyses for flooding sources, including investigation of ice jams and related damages with alternative solutions developed and evaluated. Target customers: state and local agencies in cold-region floodplains.
• Groundwater Analysis Evaluation of groundwater contamination and design of corrective measures for landfill sites and refuse handling facilities. Target customers: private landfill operators and environmental agencies.
• Hydrologic and Hydraulic Modeling Riverine hydrologic and hydraulic analysis services using HEC-RAS, HEC-HMS, HEC-1, HEC-GeoRAS, CHAMP engineering software, and WHAFIS model to determine SFHA, coastal zones, 100-year floodway, BFE, and water surface elevation profiles for various storm recurrence intervals. Target customers: federal, state, and local agencies and private developers.

Quantifiable outcome

• Performed thousands of miles of riverine and coastal studies for many counties and hundreds of communities
• +1 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators5 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Arcadis: Global design and consultancy firm with a U.S. water and environment practice serving federal, state, and municipal clients; an indirect competitor for LJA's water resources and environmental services work.
• Michael Baker International: National engineering and consulting firm with a major FEMA floodplain mapping and water resources practice; competes for the same Risk MAP and FIS task orders that LJA pursues, with greater scale and geographic reach.
• Tetra Tech: Global consulting and engineering firm with a long-standing FEMA NFIP mapping and water resources practice; a leading prime contractor on federal flood hazard programs and an indirect competitor for LJA's federal client base.
• Stantec: International engineering consultancy with a significant U.S. water and environmental practice, including FEMA-related flood hazard work; competes with LJA on federal, state, and private developer engagements.
• AtkinsRéalis (formerly Atkins North America): Major engineering services firm with a substantial U.S. water, environment, and federal services practice; competes with LJA for FEMA, USACE, and state DOT engagements in the Northeast.
• HDR Inc. U.S. engineering firm with a sizeable water resources and environmental practice; pursues similar FEMA, USACE, and state agency work as LJA, with materially greater headcount and geographic footprint.
• WSP USA: Global engineering professional services firm with strong U.S. water, environment, and earth systems practices; competes on federal and state flood hazard and water resources assignments.
• AECOM: Global infrastructure firm with a major water and environment practice serving federal agencies including FEMA and USACE; overlaps with LJA on federal flood mapping and water resources work at a much larger scale.

Direct peers

• Brown and Caldwell: Employee-owned environmental engineering firm focused on water and wastewater, with adjacent stormwater and flood management capabilities; comparable firm size and ownership profile to LJA in parts of the U.S.
• Gannett Fleming: Mid-size U.S. engineering firm with a strong FEMA NFIP/FIS production practice and similar water resources and floodplain management service lines; the closest direct peer in scale, federal contracting posture, and service mix.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/leonard-jackson-associates

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Leonard Jackson Associates