About Our Aviation Engineering Services

Our aviation engineering services hold a Part 21 Subpart J DOA enabling it to certify EASA approved STCs and Major Repairs. Additionally, where a design change or repair is classified as minor, STC Twenty One Limited is authorised to approve them under the DOA using approval reference EASA.21J.198.

Our History

Company History

STC Twenty One Limited was founded by John Dent and Peter Gaughan in the roles of Technical Director and Managing Director respectively.

The foundations of STC Twenty One Limited begin with Aero Engineering Design Limited (AED). CAA Approval Number AD/1769/89

AED was founded in 1988 by John Dent and was a UK CAA Approved Design Organisation prior to the inception of EASA.

STC Twenty One Limited continues to support the wide and varied customer base cultivated by AED since 1988 and is responsible for continued airworthiness support for all approved modifications issued prior to September 2003.

aviation engineering services stc twenty one core company history

Core Values

  • Safety is our top priority.
  • Comminunication – Communication – Communication.
  • Flexibility but with due diligence.
  • Professionalism, integrity and honestly.
  • Equal opportunities for ALL staff members.
  • Customer satisfaction for ALL our customers.
  • That hard work and customer satisfaction yields a healthy business.
  • Work together to recover from set backs.
  • To embrace change and move with the times.
aviation engineering services stc twenty one core values

Aviation Engineering Services Team

STC Twenty One employs a highly experienced and respected team of professionals comprising of the core team members below. In addition we have access to a wider network of professionals including aerodynamicists, flight test/performance engineers and flight test pilots experienced in both fixed and rotary wing aircraft types.

Commercial Team

Peter Gaughan

Managing Director / Accountable Manager

Gareth Chapman

Design Office & Project Manager

Adam Wagstaff

Commercial & Programme Manager

Quality Team

John Marchant

Design Assurance Manager

Katie Blaylock

Technical Secretary

Mechanical & Structures Team

Alastair Erskine

Head of Design & Structures / Interiors CVE

Simon Gaughan

Lead Mechanical Engineer

Anthony Pimblott

Senior Design / Certification Engineer & Structures / Interiors CVE

Daniel Walder

Associate Design and Stress Engineer

Kevin Barnes

Mechanical Design Engineer

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Matthew Hubbard

Undergraduate Design Engineer

Avionics Team

Anthony Harper

Head of Airworthiness & Avionics / Electrical CVE

Sean Hinds

Lead Avionic / Electrical Design Engineer

Alex James

Avionic Design Engineer

Mike Howitt

Apprentice Avionic Design Engineer

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Will Haywood

Apprentice Engineer

Technical Publications Team

Will Stevens

Technical Publications

Aviation Engineering Services Support Team

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John Dent

Technical Director/CVE

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Sacha Wright

Structures/Systems CVE

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Garry Dockerty

Stress/Structures Engineering

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Les Bent

Stress/Structures Engineering

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Jerrod Hartley

Stress/Structures Engineering

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Prof. Anastasios Kokkalis

Aerodynamics / Aeroelastic / Performance CVE

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Daniel Griffith

Test Pilot Fixed Wing/Rotary Wing, Performance CVE

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Sharon Fretwell

Credit Control Officer

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Paul Culley

Avionics Design Engineer [CVE]

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Ray Priestley

Avionics Design Engineer

EASA Approved Design Organisation

STC Twenty One Aviation Engineering Services

All Aircraft modifications and Aircraft repairs are managed by our EASA approved Design Office represented by STC Twenty One (EASA DOA.21J.198).

What We Offer

Aviation Engineering Services

STC Twenty One Limited holds a Part 21 Subpart J DOA enabling it to certify EASA approved STCs and Major Repairs. Additionally, where a design change or repair is classified as minor, STC Twenty One Limited is authorised to approve them under the DOA using approval reference EASA.21J.198.

Our employees are spread across our Avionics, Mechanical, Quality and Commercial Teams with a high level of experience and certification enabling the company to perform specialised services on engines and aircraft. Read more about our Services.

Aviation Engineering Services

Contact Us

Need more information or want to arrange to meet us?

+44 (0) 1332 576830

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