Photo of SIE Team posing for a picture in front of a plane

Structural Integrity Engineering

Structural Integrity Engineering, Inc. (SIE), was formed in 1981 to provide engineering, project development and technical consulting services to the aerospace industry. SIE is headquartered in Chatsworth California (30 miles north of Los Angeles) and also has branch offices in Seattle (Mukilteo, Washington near Boeing) and Madrid, Spain. SIE has a staff of 50 professionals consisting of certification engineers, aircraft designers and aircraft technicians. Five of the company’s engineers are FAA Designated Engineering Representatives (FAA DER) who have authority to approve reports and drawings for the FAA.

With the exception of the prime airframe OEM’s, SIE has performed more damage tolerance analysis for commercial aircraft than any other organization in the country. 

Photo of a blue and white cartoon plane

The Art of Aerospace Engineering

SIE maintains a stable work force through its business model that includes a mix of outside consulting work and “in-house” projects. Aircraft design and certification is the company’s “core” business.

Photo of SIE Staff Graph

SIE's Experienced Team

A Stable and Growing Staff

Over the last 30 years, the principals have specialized in aircraft research and development programs involving advanced design, structural analysis and certification. These design and analytical capabilities also include fatigue and damage tolerance considerations associated with aging aircraft. SIE is widely recognized by the FAA, and the aircraft industry-at-large as a leading expert in the areas of structural substantiation, fracture mechanics, fatigue and damage tolerance analysis and certification, as well as aircraft cargo conversions.

History of SIE

1981

Damage Tolerance Analysis/Fatigue

Damage Tolerance Analysis/Fatigue

1986

Stress Analysis and Finite Element Capability

Stress Analysis and Finite Element Capability

1989

Structural Certification of DC-8 Hushkit

Structural Certification of DC-8 Hushkit

1991

Structures Certification (First DER)

Structures Certification (First DER)

1992

External Aerodynamic Loads, Operational Weight Upgrades for DC-8, B727

External Aerodynamic Loads, Operational Weight Upgrades for DC-8, B727

1995

STCs for Freighter Floors and Cargo Barriers

STCs for Freighter Floors and Cargo Barriers

1996

Structural Design

Structural Design

1999

VIP Interiors

VIP Interiors

2002

Systems Design and Certification (Electrical/Mechanical)

Systems Design and Certification (Electrical/Mechanical)

2003

Twin Otter Wing Life Extension STC

Twin Otter Wing Life Extension STC

2006

Design, Analysis, Certification, B757-200 Passenger to Freighter Conversion

Design, Analysis, Certification, B757-200 Passenger to Freighter Conversion

2008

Pylon & Associated Systems for Honeywell Flying Test Bed Aircraft

Pylon & Associated Systems for Honeywell Flying Test Bed Aircraft

2009

Procurement of Fabricated Parts & Components, Wifi and InFlight Entertainment Systems Installation & Design

Procurement of Fabricated Parts & Components, Wifi and InFlight Entertainment Systems Installation & Design

2011

SIE Utilizes Additive Manufacturing for ECS Duct Modification

SIE Utilizes Additive Manufacturing for ECS Duct Modification

2012

ORBIS Flying Eye Hospital

ORBIS Flying Eye Hospital

2014

AS9100 Certification

AS9100 Certification

2015

Developed Test Pylon for GE Aviations’ Passport 20 Engine

Developed Test Pylon for GE Aviations’ Passport 20 Engine

2016

Started work on A320 Passenger to Freighter Conversion Program

Started work on A320 Passenger to Freighter Conversion Program

2017

SIE Assists Honeywell in modification of its FTB

SIE Assists Honeywell in modification of its FTB
Histoy of sie