Nabih Youssef & Associates

What Nabih Youssef & Associates does

Nabih Youssef Associates Structural Engineers (NYA) is a Los Angeles-headquartered structural engineering consulting firm founded by Nabih Youssef, specializing in seismic design, performance-based seismic engineering, and complex structural systems for healthcare, civic, commercial, education, hospitality, and aerospace clients. The firm's technical capabilities include base isolation systems (notably deployed at Los Angeles City Hall, the tallest building ever base-isolated), buckling restrained braced frames (LAPD Headquarters), un-stiffened thin steel plate shear walls (LA Live), fiber-reinforced polymer strengthening, and a performance-based Soil-Structure Interaction framework recognized at the 2025 SEAOC Convention. NYA also developed advanced simulation, weld modeling, and failure prediction tools through SpaceX's Starship and Super Heavy programs.

The firm generates revenue through project-based professional services engagements, with quote-driven pricing that varies by project scope and complexity. Services span the full project lifecycle, including structural design, seismic retrofit, peer review, forensic engineering, due diligence, feasibility studies, tenant improvements, shoring, and specialized consulting. Distribution is primarily direct enterprise engagement via website, phone, and referrals, with global reach across the U.S., Canada, Europe, the Middle East, and Asia. Customer segments are diverse — including major healthcare systems (UCSF, Stanford, UCLA, Cedars-Sinai), government agencies (LA City Hall, LAPD HQ, Long Beach Courthouse), commercial developers (Brookfield, Apple Campus 2), and aerospace (SpaceX) — and the firm reports a 95%+ repeat business rate in tenant improvements.

Name

Nabih Youssef & Associates

Legal name

Nabih Youssef Associates Structural Engineers

Website

https://nyase.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

101–250 employees

Short description

NYA is a Los Angeles-headquartered structural engineering firm specializing in seismic design, performance-based seismic engineering, and complex structural systems for healthcare, civic, commercial, education, hospitality, and aerospace clients across the U.S. and international markets.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

Architectural, Engineering, and Related Services (5413)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering services
• Seismic engineering design
• Building retrofit services
• Performance-based seismic design
• Soil-structure interaction analysis

Headquarters

HQ city

Los Angeles

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Structural Engineering Consulting Services: NYA generates revenue through project-based professional services engagements as a structural engineering firm. Services are tailored to each project and client, spanning new construction design, seismic retrofit, peer review, feasibility studies, due diligence, and specialized consulting. Revenue is earned through consulting fees, design services, and engineering project delivery, with no publicly disclosed standard pricing — each engagement is quoted individually based on project scope, complexity, and client requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

NYA is a structural engineering consulting firm that designs safe, code-compliant, and seismically resilient buildings for healthcare, civic, commercial, hospitality, educational, and aerospace clients. The firm delivers new construction design, seismic retrofitting, peer review, feasibility studies, due diligence, tenant improvements, and specialized consulting — with deep expertise in performance-based seismic design, base isolation, soil-structure interaction, and mission-critical aerospace structures for SpaceX.

Product overview

NYA provides structural engineering services as a unified professional consulting practice. The firm offers a comprehensive portfolio of engineering services centered around structural design, seismic engineering, and specialized consulting for complex construction projects. Core offerings include Performance-Based Seismic Design, Soil-Structure Interaction (SSI) Analysis, Seismic Retrofitting, Tenant Improvements, Space Exploration Structural Engineering, Shoring Solutions, Forensic Engineering, and Peer Review Services. The healthcare sector represents a significant practice area, with dedicated expertise for hospitals and medical research facilities. Services span the full project lifecycle from feasibility studies and due diligence through design, peer review, and construction support.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Services Comprehensive structural engineering services including design, analysis, peer review, and consulting for new construction, retrofits, and rehabilitation across residential, commercial, civic, healthcare, and institutional building types.
• Performance-Based Seismic Design Advanced seismic engineering approach using performance-based design methodologies to ensure buildings meet specific performance objectives under earthquake loading, exceeding standard code requirements.
• Soil-Structure Interaction (SSI) Services Expert SSI analysis services evaluating settlement, stiffness, and seismic response to optimize foundation performance for critical infrastructure and complex building systems using nonlinear time-history analysis and finite element modeling.
• Tenant Improvements Specialized structural engineering for interior renovations and reconfigurations of commercial, institutional, and mixed-use properties, including floor reinforcement, mezzanine support, seismic upgrades, and ADA compliance verification.
• Space Exploration Structural Engineering Structural engineering services for space exploration facilities including launch platforms, payload integration facilities, space simulation labs, mission control structures, and cleanroom support structures.
• Shoring Solutions Shoring design services for excavation support, slope stabilization, and adjacent structure protection using soldier piles, sheet piles, secant piles, and tieback systems.
• Seismic Retrofitting and Rehabilitation Seismic upgrade and strengthening services for existing buildings to meet current code requirements and improve performance during seismic events.
• Forensic Engineering Post-event investigation, damage assessment, and engineering analysis services following earthquakes or structural incidents.
• Peer Review Services Independent structural engineering review services for complex projects including high-rise buildings, stadiums, and major infrastructure.
• Healthcare Facility Engineering Specialized structural engineering for hospitals, academic medical centers, and research facilities requiring seismic resilience and code compliance.

Quantifiable outcome

• Over 95% repeat business rate in tenant improvements, with first-time clients almost always involving NYA in their next project.
• +4 more outcomes

Named customers21 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• John A. Martin & Associates: Los Angeles-based structural engineering firm of comparable size and focus, with deep expertise in seismic design, healthcare, civic, and commercial high-rise projects across California — the closest direct peer to NYA in geography and practice mix.
• Degenkolb Engineers: San Francisco-headquartered structural engineering firm specializing in seismic retrofit and performance-based design for healthcare, civic, and education clients; widely regarded as NYA's Northern California counterpart in mission-critical structural consulting.
• Forell/Elsesser Engineers: San Francisco-based structural engineering firm with deep seismic retrofit and base-isolation expertise, comparable boutique scale, and similar project-mix focus on healthcare, civic, and adaptive reuse — a closely aligned specialty peer.

Broad incumbents

• Thornton Tomasetti: Global structural engineering firm with deep performance-based seismic, forensics, and aerospace-adjacent practices. Overlaps NYA across all major service lines but at much larger scale and broader geographic footprint.
• Magnusson Klemencic Associates (MKA): Top-tier US structural and civil engineering firm with strength in high-rise seismic design, performance-based design, and complex civic/commercial projects — a broader incumbent peer with overlapping technical capabilities.
• Simpson Gumpertz & Heger (SGH): National structural engineering firm with a specialty in advanced analysis, forensic engineering, and building enclosure — overlapping NYA in structural analysis depth but operating at much broader geographic and sector scale.
• Walter P Moore: Large US structural engineering firm with significant healthcare, sports, and civic practices; comparable technical depth in seismic and high-rise design but with a much broader national and international footprint.
• KPFF: Major US structural and civil engineering firm with a strong California presence (KPFF Los Angeles) and broad specialty practice overlap with NYA in healthcare, commercial, and civic structural work.
• Arup: Global engineering consultancy with a substantial structural engineering practice covering seismic design, high-rise, and complex facilities; competes for marquee civic and commercial work at the same tier as NYA but at dramatically larger scale.

Regional players

• T.Y. Lin International: Engineering firm with deep structural and bridge expertise, particularly in California and Asia; overlaps NYA in structural consulting and seismic design but with a different primary focus on transportation and infrastructure projects.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/112373755491342

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Nabih Youssef & Associates