Test aircraft at Sierra Technical Services


The STS Engineering Department is a collective of multi-disciplined Aerospace, Structural, Design, and Mechanical Engineers.

STS offers a full range of engineering services to include;

  • New Aircraft Configuration Development
  • Aerodynamics
  • Propulsion Design
  • Thermodynamics Analysis
  • Stability & Controls
  • Flight Controls
  • Aircraft Structures Analysis and Design
  • 6DoF Support
  • RCS Model Design
  • Wind Tunnel Model Test Planning

STS uses the following software to aid in the Engineering process:

  • CATIA V5


High-quality, durable, cost effective products that exceed industry standard is the ultimate goal of Sierra Technical Services, Inc. (STS) Manufacturing department. STS manufactures components for a wide range of aerospace applications; from detailed parts, to flat panels, to complex composite structures involving intricate layup schedules.

A Sierra Technical Services Design

STS’ 20,000-sq. ft. manufacturing facility at the Tehachapi Municipal Airport (KTSP) is designed to increase work-flow efficiency and includes (3) Hangars which house (2) Composite ovens, (2) Clean/Cold rooms, (1) Large freezer for material storage, and (1) Dust Booth.

Our manufacturing services include:

  • Tooling Manufacturing
  • Composite Fabrication – Utilizing out of Autoclave Processing Techniques
  • Custom Metal Fabricating & Coating
  • Airframe Assembly
  • Aircraft Subsystems Installation & Integration
  • Data Acquisition System Installation & Integration
  • Composite Repair

Our production methodology and configuration management system allows us to document the “As-Built” manufacturing process while maintaining stringent delivery timelines.

SL Laser Projection Systems aid our qualified composite technicians in processing and assembling materials with a high level of accuracy by projecting green laser light to control ply & core placement and increase manufacturing productivity.

A Sierra Technical Services Design

Quality Assurance

Achieving and maintaining the highest level of quality throughout our AS9100D & ISO 9001:2015 certified quality management system instills confidence in the products and services we provide to our clientele.

Consistent Quality is implemented utilizing the following;

  • Documented Process Specifications & Inspection Plans/Procedures
  • Configuration Management
  • Skilled Inspection Staff
  • Cutting-Edge Inspection Equipment
  • Non-Conformance Reporting and Trend Analysis
  • NIST Certified Calibration
  • Metrology – CMM and Ultrasonic Inspection
  • Continual Improvement Methodology

As a part of STS’ commitment to quality, we utilize a variety of inspection equipment and services to ensure a quality product is delivered on-time, and on budget.

We continually review, document and improve all processes, giving you the assurance that STS operates at the highest possible standard.

Our quality assurance department is equipped with calibrated test, measure and inspection equipment used throughout all stages of a project.

Our Services