JetLeg Aviation Advisory
Business jet above the clouds at dawn

Welcome to

JetLeg
Aviation Advisory — Boutique Business Aviation Consulting

Your Trusted Partner in Business Aviation.

JetLeg Aviation Advisory is a boutique aviation consulting firm specializing in strategic support to business aircraft owners, law firms, financial institutions, leasing companies, and aircraft brokers. Our expert team delivers tailored solutions to optimize aircraft operations, manage assets efficiently, and navigate the complexities of the aviation industry — all to the sole benefit of the aircraft owner.

JetLeg understands that the aircraft is a tool and a means of transport for the owner to succeed in their respective main business. JetLeg Aviation Advisory will contribute at its best to support this.

Our ServicesContact

Experts

About us

JetLeg Aviation Advisory was founded in 2021 by Martin Spiegl, a seasoned aviation expert with extensive experience in business and commercial aviation. His impressive career spans multiple facets of the industry, from aircraft operations and maintenance to pilot experience and technical advisory roles.

Martin Spiegl's Expertise

  • 01

    Former Managing Director of a business aviation operator (charter & high utilization), overseeing operational and strategic initiatives.

  • 02

    Over 15 years of experience in the maintenance and operation of business aviation aircraft.

  • 03

    Several years as an airline pilot for Team Lufthansa / Lufthansa Regional, gaining firsthand insight into commercial aviation operations.

  • 04

    Active pilot on Bombardier Challenger 604/605, maintaining direct involvement in aircraft operations.

  • 05

    Served as a Technical Advisor to Bombardier for more than 10 years, contributing to aircraft improvements and modifications as part of the Customer Advisory Board for Learjet, Challenger and Global Series.

  • 06

    Successfully managed the purchase and sale of business aviation aircraft over the past 10 years, overseeing projects with a total transaction value exceeding $320 million — including project management, negotiations, contracts, financing, technical acceptance and operational implementation.

With a wealth of experience and a deep understanding of business aviation, Martin Spiegl leads JetLeg Aviation Advisory in providing unparalleled consultancy and strategic solutions for clients worldwide.

What we do

Services

Four disciplines, one focus: protecting the aircraft owner across operations, technical projects, new aircraft completion, and time-critical spare parts.

Business jet cabin interior with cream leather seats and dark wood panels
01 / Service

Advice on Operational Efficiency

JetLeg provides customized strategies to enhance aircraft availability, ensuring that aircraft downtime is minimized and operational readiness is maximized. We develop improved charter utilization plans to optimize aircraft usage — synchronized with owners' use — and generate additional revenue where applicable. Our expertise extends to efficient operational and maintenance planning, allowing for cost-effective and seamless aircraft upkeep.

Additionally, we provide comprehensive policies and procedures to establish a structured and sustainable operation from an aircraft owner's perspective, ensuring regulatory compliance and best practices are upheld at all times.

Close-up of a business jet turbofan engine on the tarmac
02 / Service

Technical Support

JetLeg offers comprehensive supervision for Aircraft Pre-Purchase Inspections, ensuring the best possible outcome whether you are buying or selling. We defend your technical rights as a seller or help you secure a flawless aircraft as a buyer, while complying with all conditions of the aircraft purchase contract. Additionally, we oversee major maintenance projects, including base maintenance events, engine overhauls, cabin refurbishments, and avionics upgrades.

Our success is driven by a combination of deep technical expertise and commercial insight, along with our extensive network of contacts across all OEMs and key industry partners. This allows us to deliver seamless technical project execution, cost-effective solutions, and optimal results for our clients.

Business jet wing assembly in a production hangar
03 / Service

New Aircraft Completion Management

JetLeg Aviation Advisory provides expert guidance throughout the entire new aircraft build process, ensuring a seamless and efficient experience for owners. Our support begins with contract negotiations, helping clients secure favorable terms and specifications. We assist in selecting materials and optional features tailored to individual preferences and operational needs.

Throughout the production process, we closely monitor and review the green aircraft build, ensuring adherence to quality standards and timelines. We oversee aircraft painting to ensure a flawless finish, manage interior installation with attention to craftsmanship and detail, and conduct a thorough final delivery inspection.

Aircraft owners have the flexibility to choose the specific stages where they require our support, allowing for a fully customized advisory service that meets their unique needs and expectations.

Aircraft turbofan engine and landing gear components
04 / Service

Critical Spare Parts

JetLeg specializes in sourcing critical spare parts for aircraft undergoing base maintenance, pre-purchase inspections, or experiencing Aircraft on Ground (AOG) situations. Many essential components have long lead times, sometimes stretching to several months, or may be obsolete and no longer in production. Our extensive global network allows us to locate and procure these parts with exceptional speed, ensuring that no project faces unnecessary delays.

Our expertise includes sourcing loaner landing gears, engines, and Auxiliary Power Units (APUs), providing interim solutions to keep operations running smoothly. With our industry connections and deep market knowledge, JetLeg ensures that clients have access to the necessary components precisely when they are needed, reducing downtime and maintaining operational efficiency.

Track record

References

Aircraft transactions · Operational consultancy

JetLeg Aviation Advisory has earned a strong reputation in the aviation industry by successfully partnering with business aircraft owners, law firms, financial institutions, leasing companies, and aircraft brokers. Our proven track record spans a wide range of successful projects, from seamless aircraft transactions to operational consultancy and strategic project management.

transactionsconsultancymanagement

We take pride in our contributions to the efficiency and growth of numerous aviation businesses, leveraging our expertise, unwavering dedication, and extensive industry network. Selected past projects include:

  • 01

    Commercial and technical supervision of a 120-month inspection including paint and complete cabin refurbishment on a Global XRS.

  • 02

    Pre-purchase inspection supervision on Gulfstream G650ER.

  • 03

    96-month inspection on a Challenger 604.

  • 04

    Management of engine overhaul for CF34-3B engines including spare part provisioning.

  • 05

    Technical assistance in AOC purchase of an EASA AOC.

  • 06

    Pre-purchase inspection supervision on the buyer's side of an Airbus A319CJ.

  • 07

    Pre-purchase inspection supervision on the seller's side of an Embraer Phenom 100.

  • 08

    Restructuring of NCC flight department for ultra long-range operations.

  • 09

    Various new aircraft completion projects such as CL 605, 650, CL850 and Global 6000/6500.

We highly value the trust our clients place in us and are pleased to provide references upon request. Contact us today to learn more about our past successes and how we can support your aviation needs.

Contact

Let's Work
Together

Tell us more about your project

Connect with JetLeg Aviation Advisory today and discover how our expertise can help you navigate the complexities of business aviation. Let's discuss how we can support your aviation needs and drive efficiency in your operations.

Email
info@jetleg.aero
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