LMI Aerospace (LMIA) 8-K Regulation FD Disclosure

EXHIBIT 99.1

Management Presentation

September 2011

LMI AEROSPACE PROPRIETARY

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Safe Harbor Statements

In addition to the Company’s past performance and other historical facts, this presentation
contains certain forward-looking information, such as current expectations as to future
performance and schedules. Such forward-looking information is based on management’s
current assumptions and analysis, which are subject to numerous business risks and
uncertainties, including risk and uncertainties that relate to acquisitions.There can be no
assurance that these assumptions will prove to be accurate in the future.Actual results may
differ from these forward-looking statements as a result of, among other things, the factors
detailed from time to time in the Company’s filings with the Securities and Exchange
Commission.Please refer to the Risk Factors contained in the Company’s annual report on Form
10-K for the year ended December 31, 2010.

LMI AEROSPACE PROPRIETARY

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Senior Management

Lawrence E. Dickinson

CFO & Secretary

Ronald S. Saks

CEO & Director

>Chief Executive Officer of LMI since 1984

> Chief Financial Officer of LMI since 1993

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(1) Based on financials for the 12-month period ended December 31, 2010

Investment Highlights

>Leading provider of design engineering services, structural assemblies, kits and components
for aerospace and defense markets

>Well-positioned on key programs with leading OEMs and Tier-1 market participants

>Favorable long-term industry trends toward outsourcing engineering, production and
assembly

>Broad revenue / customer diversification(1)

•33% services, 67% production and assembly

•39% large commercial, 24% military, 30% regional and business

>Growth strategy leverages existing programs, disciplined M&A approach and integrated
design-build model

>Experienced management team with an average of over 20 years’ experience and strong
industry relationships

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Operating Income(1)

Revenue(1)

Investment Highlights (continued)

>Proven track record of financial performance

>Overall 2011 Revenues are expected to be $258 - $268 million

•Aerostructures: $172 - $178 million

•Engineering Services: $86 - $90 million

(1) 2011E reflects midpoint of Company guidance as of August 8, 2011

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LMI’s Operations In Key Aerospace Markets

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Strong Relationships with OEMs & Tier 1s

(1)

(1)Acquired by Triumph Group in 2010

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Strategic Initiatives

>Achieve organic growth within our engineering and manufacturing businesses as well as
through new design-build projects

>Make project management expertise the cornerstone of our competitive advantage

>Continue to diversify our customers across three major market sectors

>Pursue strategic acquisitions to build critical mass and capabilities to win larger, more
complex projects

>Provide exemplary customer service

>Target perfect quality and delivery performance

>Implement global sourcing strategy to provide value to our customers

>Continue to invest in training and development of our workforce

Goal: Double our revenue by 2014 and maintain debt to equity ratio less than 1:1

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LMI Offers Full Lifecycle Support from Engineering &
Design to Assembly & Manufacturing

>Customer defines
product or project
requirements

>Done together with
customer

>Time and materials
billing

>Testing on fixed
price basis

>Joint input between
LMI and Customer

>Quote in
competition with
others

>Build to print

>Long-term
contracts with
customers

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Design-Build Strategy

“We will provide integrated solutions to our
aerospace customers through creative and
value-driven engineering and manufacturing
processes, throughout the product life cycle.”

>LMI is positioned as a “turnkey” aerospace systems
provider, capitalizing on the accelerating trend of OEMs
outsourcing complex aircraft development projects

>Technical leadership through over 300 highly skilled D3
engineers and 49 Intec technicians

>New programs expected to require substantial annual
investments in engineering and tooling

>Continue to seek acquisitions to broaden capabilities
and support production of larger, complex assemblies

Select Customers

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Mitsubishi Regional Jet Tailcone

>MJET required a supplier with design, tooling and fabrication
capabilities

>Critical Design Review held in 4th quarter 2010

>1st unit to be delivered in 1st quarter 2012

>Engineering and tooling funded through milestone payments

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Add New Programs and Market Share Gains

>Pursue new programs with both new and existing customers

•Add new programs across Commercial, Military, Regional and Business Jet sectors

•Aerostructures and Engineering segments have consistently added 4-6 new major
programs per year

>New design-build programs expected to require substantial initial investments in engineering
and tooling

•Satisfy stringent ROI requirement

>Potential long-term commitment of in-house design resources may be necessary

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Growth through Acquisitions

>Plan to acquire businesses with solid management teams and technical capabilities to
continue expanding the complexity of our products

•Composites and other non-metal products

•High speed machining

>Acquisition program from 1998 through 2009 resulted in 8 successfully acquired and
integrated businesses

•Broadened our breadth of engineering and manufacturing capabilities

•Diversified our markets and programs served

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FY 2010 Aerostructures Revenue - $149.0m

Diversified Revenues Across Aerospace Sectors

Disciplined diversification strategy designed to protect LMI from downturns in any single sector

(1)Sector revenue breakdown based on financials for the 12-month period ended December 31, 2010

Eliminations for the 12-month period totaled $0.5 million and spread ratably across sector percentages

FY 2010 Engineering Services Revenue - $74.4m

FY 2010 LMI Revenue - $223.4m

Regional and Business Jet

Large Commercial Aircraft

Military Aircraft

Other

(US$ in millions)

(US$ in millions)

(US$ in millions)

$18.6

$5.6

$59.4

$29.1

$45.2

$21.1

$34.6

$9.8

$15.4

$66.3

$88.5

$53.2

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>Global GDP growth leading to
increased air traffic volumes in
domestic and international
markets

>OEMs have increased planned
production rates (e.g. 737, 747,
777, 787, A320)

>New fuel-efficient aircraft
programs are gaining traction
(e.g. 787, A350) with significant
backlog

>Rotorcraft demand driven by high
utilization and aging fleet

>Engineering services for military
aircraft programs driven by
upgrades, maintenance,
modification and new aircraft
development

>Expectations for Sikorsky military
helicopter deliveries to reach 210
units in 2012

>Business jet flight operations
experienced double-digit growth
for most of 2010

>High end large cabin market is
showing signs of recovery

>Large cabin Gulfstream deliveries
expected to grow to 115 in 2013
from 75 in 2010

Military Aircraft

Regional and Business Jet

Focus on Diverse Markets

Large Commercial Aircraft

Gulfstream Large Cabin Deliveries

Sikorsky Military Helicopter Deliveries

Boeing Aircraft Deliveries

Source: DoD, Industry and Wall Street research

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LMI Programs

Large Commercial Aircraft

Military Aircraft

Regional and Business Jet

767 Winglet
Modification

Boeing Structural
Design

767 Tanker

Sikorsky Cabin
Assembly

Fuselage Kit

MJET

>Wing/Wingbox Design

>Fuselage/Empennage Design

>Composite Design Expertise

>Weight Improvement Studies

>Tool Design and Fabrication

>Rapid Prototyping and Test

>Wing Skins and
Components

>Fuselage Skins and
Components

>Leading Edges

>Winglet Leading Edge
and Modification Kit

>Structural Sheet Metal and
Extruded Components

>Detail Interior Components

>Helicopter Components

>Helicopter Assemblies

>Housings and Assemblies
for Gun Turrets

>Avionics and Tactical
Software Development

>Winglet Design

>Certification Planning
and Support

>Design for
Manufacturing Cost

Aerostructures Products

Engineering Services

G-650

G-550

Blackhawk Models

CH-53K

787

777

LMI Platform

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History of Financial Success

(US$ in millions)
Revenue	$258.0	-	$268.0
Gross Profit Margin	24.0%	-	24.8%
SG&A	$33.8	-	$35.2
Interest Expense	$1.4	-	$1.5
Tax Rate			32.5%
D&A, Stock Comp.	$9.6		$10.2

(US$ in millions)	Aerostructures	Engineering Services
Revenue	$172.0-$178.0	$86.0-$90.0
Gross Profit Margin	27.0%-27.8%	18.0 % - 18.8%
SG&A	$26.0-$27.0	$7.8-$8.2

Guidance for 2011

Revenue(1)

Operating Income(1)

Segment Guidance for 2011

(1) 2011E reflects midpoint of Company guidance as of August 8 2011

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>Significant liquidity

•$125 million revolver with additional $25 million in an accordion feature

•Focus on achieving significant free cash flow

(1) 2011E reflects midpoint of Company guidance as of August 8 2011.EBITDA equals operating income plus depreciation,

amortization, stock compensation expense and goodwill impairment

(2) $125 million capacity

(3) Excludes capital leases and equipment notes

	12/31/10	6/30/11
Cash & Equivalents	$1.9	$7.5
Drawn revolver(2)	-	-
Net Debt(3)	$(1.9)	$(7.5)
Undrawn revolver(2)	$80.0	$125.0

Strong Cash Generation

EBITDA(1)

Current Net Debt and Revolver Capacity

(US$ in millions)

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Investment Highlights

>Leading provider of design engineering services, structural assemblies, kits and
components for aerospace and defense markets

>Well-positioned on key programs with leading OEMs and Tier-1 market participants

>Favorable long-term industry trends toward outsourcing engineering, production and
assembly

>Broad revenue / customer diversification

>Demonstrated track record of strong financial performance

>Growth strategy leverages existing programs, disciplined M&A approach and integrated
design-build model

>Experienced management team with an average of over 20 years’ experience and strong
industry relationships