(480)536-9207 [email protected]


Who We Are

H.E.R.O.S. INC. (Helicopter Engine Repair Overhaul Services) is a family-owned operation in Arizona committed to best-in-class services as factory-authorized Rolls-Royce M250 & RR 300 Authorized Maintenance, Repair and Overhaul Center (AMROC).

We believe family extends to our team and clients as well — we’re committed to the lives and development of our staff, and we’re invested in the success of our customers.



Our Beginning

The establishment of Helicopter Engine Repair Overhaul Services, Inc. (H.E.R.O.S. Inc.) provides operators across all sectors with an exclusive opportunity to benefit from personalized, high-quality engine repair and overhaul services for the M250 Series of engines and accessories. Since its inception by Heros Kajberouni in 1988, both individual ship owners and large fleet operators have come to rely on our exceptional workmanship, competitive pricing, and outstanding customer service.

At H.E.R.O.S. Inc., we uphold product quality by maintaining control over our processes. Each engine component undergoes a meticulous disassembly and is carefully processed through our facility, where it undergoes thorough cleaning, inspection, assembly, and testing to meet or surpass manufacturers’ specifications. Throughout the repair and overhaul process, we utilize the latest technologies and equipment to ensure a superior end product. Our shop technicians bring together factory training with decades of experience in repair, overhaul, and field operations.


Why the M250

At H.E.R.O.S. Inc., we take immense pride in being masters of the M250 engine. Our expertise and proficiency in this specific engine stem from years of dedicated focus, technical knowledge, and hands-on experience. 

Our mastery of the M250 engine is a result of our experience, technical knowledge, training, collaborative partnerships, customer-centric approach, commitment to continuous improvement, and top-notch facilities. With these factors in place, we are well-equipped to provide superior services and support to our customers, solidifying our reputation as masters of the M250 engine.


Leadership Team

Raffi Kajberouni

Raffi Kajberouni

President, General Manager

Raffi Kajberouni is our current President and General Manager, who has been with the company since inception through family. Prior to his new appointment, Raffi served as Vice President for 2 years and 9 months before being promoted to their current position in January 2022.

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Raffi has been instrumental in the success of Helicopter Engine Repair Overhaul Service, Inc (H.E.R.O.S. Inc), which was established in 1988 to provide customized engine repair and overhaul services to small operators. He, along with the trusted management, have helped the company grow and extend its services to operators world-wide while maintaining its reputation for reliable service.

Raffi’s exceptional leadership skills and business acumen have been demonstrated in various achievements. Raffi, along with Blake Davies, spearheaded the company’s move from California to Greater Phoenix, which helped them expand their business to new growth and potential.

Before joining H.E.R.O.S. Inc, Raffi served 15 years in law enforcement.

Blake Davies

Blake Davies

Vice President, Director of Sales

[email protected]
(661) 310-8570 (cell)
(480) 536-9207 (office)

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Blake is an accomplished professional who has made significant contributions to the aviation industry throughout his career. Joining H.E.R.O.S. Inc in August 2013 as the Director of Sales, Blake brought with him a wealth of knowledge and expertise.

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His journey began in 1988 when he embarked on his career as an A&P technician, laying the foundation for his success. In April 1997, Blake commenced his tenure at Rolls-Royce Engine Services in Oakland, California.

Through sheer dedication and outstanding performance, he rapidly ascended the corporate ladder, ultimately attaining the esteemed position of Regional Sales and Service Manager for the Western Region of the United States.

In this role, Blake assumed responsibility for overseeing Rolls-Royce M250 Sales, Service, and Contracts, showcasing his exceptional leadership skills and business acumen.


Heros Kajberouni

Heros Kajberouni

Founder, Chairman of the Board

The creative mind and the chief strategist, Heros founded the company in 1988 with the single goal of being the best M250 engine overhaul provider in the country. Since then, the company has grown exponentially and, in the process, it has expanded its client base to offer a wide range of services to domestic and international operators.

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Heros began his training in the 1970’s, when he joined the Agusta/Bell Training Program in Italy. After moving to the United States in 1979, Heros attended the Bell Helicopter School for engine and component overhaul, then briefly worked with Briles Wing and Helicopter.

Later, he joined Hamilton Standard, a division of United Technologies Corporation in 1982. In six years, Heros worked himself to the engine program manager. When Hamilton Standard decided to terminate the 250 Series engine program, Heros took this opportunity to purchase all the tooling and spare parts and founded, H.E.R.O.S Inc.

Starting as a one-man operator in a 1,350 square foot facility in Riverside, California, Heros has grown the organization to a 19,500 square foot facility, employing 20 employees, in Chandler, Arizona.

Carlos Gastelum

Carlos Gastelum

Dir. Quality, Accountable Mgr.

Carlos joined our team in February 2022, assuming the role of Director of Quality and later transitioning into the position of Accountable Manager. With over twenty years of experience in the turbine industry, Carlos is a highly accomplished professional who has made significant contributions to the organizations he has worked for.

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Throughout his career, Carlos has developed a reputation for his exceptional problem-solving skills and his ability to navigate complex situations with limited standardization. His expertise in areas such as Six Sigma Black Belt and Lean Manufacturing has played a pivotal role in optimizing processes, increasing efficiency, and driving productivity within the organizations he has been a part of.

As a leader, Carlos possesses a unique ability to guide, inspire, and influence others, rallying them towards a common goal or vision. His leadership style fosters a collaborative and cohesive work environment, allowing teams to thrive and reach their full potential. Carlos’s strategic mindset and strong interpersonal skills enable him to build strong relationships with team members, stakeholders, and clients alike.

Prior to his career in the turbine industry, Carlos served in the US Navy, further cultivating his sense of discipline, dedication, and teamwork. His military background instilled in him a strong work ethic and a commitment to excellence, qualities that have contributed to his success in his professional endeavors.

Carlos’s diverse skill set, extensive industry experience, and exceptional leadership abilities make him a valuable asset to our team. His commitment to quality, continuous improvement, and achieving results aligns perfectly with our organization’s goals and vision.

Además, se destaca que Carlos habla español, lo que le permite comunicarse efectivamente en un entorno multicultural y brindar apoyo adicional a nuestros equipos hispanohablantes.


Join Our Team

H.E.R.O.S. Inc. places a strong emphasis on employee-centric values to foster a work environment that supports the growth, well-being, and success of its employees.

By prioritizing empowerment, safety, collaboration, community engagement, diversity and inclusion, employee wellness, continuous training and development, and effective communication, H.E.R.O.S. Inc. strives to create a positive and fulfilling workplace where employees feel valued, motivated, and inspired to excel in their roles.

The company’s commitment to these principles enhances employee satisfaction, productivity, and overall success, contributing to a thriving and dynamic organization.


Departments & Key Staff

Engine Shop

Our Engine Shop specializes in the repair, overhaul, and maintenance of the M250 series turbine engines. Our highly skilled technicians ensure the highest standards of quality and precision in engine diagnostics, disassembly, inspection, repair, and reassembly.

Accessory Shop

The Accessory Shop focuses on the repair, overhaul, and testing of engine accessories and components. This includes Fuel Control Units, Fuel Pumps, Governors, Bleed Valves, Fuel Nozzles, Anti-Ice Valves and more. Our dedicated technicians ensure that each accessory meets the required specifications and performance standards.

Machine Shop

Our Machine Shop is equipped with state-of-the-art machinery and tools for precision machining and fabrication. Skilled machinists operate various equipment to manufacture and repair engine parts, ensuring precise tolerances and adherence to design specifications.

Materials Department

The Materials Department is responsible for managing the procurement and inventory of necessary materials, components, and supplies for our repair and overhaul operations. They ensure timely availability of high-quality materials, working closely with suppliers and maintaining strict quality control standards.

Shipping & Receiving

The Shipping and Receiving Department handles the logistics of incoming and outgoing engine components, accessories, and materials. They ensure proper packaging, documentation, and tracking of shipments to guarantee timely and secure delivery to and from our clients.

Quality Assurance

The Quality Assurance Department plays a vital role in ensuring that all repair and overhaul processes meet the highest quality standards. They perform thorough inspections, audits, and certifications to ensure compliance with industry regulations and customer requirements.


Our Sales Department is responsible for building and maintaining relationships with clients, understanding their needs, and providing tailored solutions. They offer technical expertise, industry knowledge, and exceptional customer service to support clients in making informed decisions regarding their engine repair and overhaul requirements.

Customer Support

The Customer Support department plays a vital role in maintaining strong relationships with clients. They handle customer inquiries, provide technical assistance, and ensure customer satisfaction throughout the repair and overhaul process. Customer Support representatives serve as a primary point of contact, addressing client needs and coordinating services.

Nathan Farnsworth

Nathan Farnsworth

Engine Shop Supervisor

[email protected]
(480) 536-9207 ext. 111

Nathan Farnsworth is an accomplished professional with a strong background in engine maintenance and a passion for leadership. With over eight years of experience in the aerospace industry, he currently serves as the Engine Shop Supervisor, where he oversees the maintenance and operations of M250 Series engines.

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His extensive experience in maintaining Rolls Royce engines, coupled with his leadership abilities, has allowed him to excel in his role as Engine Shop Supervisor. His attention to detail, knowledge of engine systems, and commitment to quality have contributed to the overall success of Heros Inc.


Peter Griggs

Peter Griggs

Program Manager Accessory Shop

[email protected]
(480) 536-9207 ext. 110

Peter oversees the operations of the Accessory shop, bringing with him a wealth of experience in the aviation industry. With a strong background in various technical roles, Peter has honed his skills and expertise over the years, solidifying his reputation as a reliable and capable professional. Peter has amassed over 30 years of specialized experience in the industry, particularly with Honeywell fuel systems such as LTS 101, PT6, and M250.

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Peter’s journey in the aviation field began as a skilled Mechanic, specializing in five different helicopter types. His hands-on experience in maintaining and servicing these aircraft allowed him to develop a deep understanding of their intricacies and complexities. Peter ensured that each helicopter met the highest safety and operational standards before being cleared for flight.

Currently, as the Program Manager, Peter brings his extensive knowledge and experience to the table. He effectively manages projects related to engine accessories, coordinating the efforts of cross-functional teams and ensuring timely delivery and quality outcomes.

Alicia Hooker

Alicia Hooker

Procurement Coordinator

[email protected]
(480) 536-9207 ext. 109

Presently, Alicia serves as our adept procurement coordinator, originally hailing from California, she made the transition to Arizona in the Fall of 2020 to pursue her career aspirations. With a diverse background in retail, inventory management, and procurement, Alicia has accumulated a wealth of experience in the field of Aerospace over the course of approximately six years.

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Her strong work ethic and passion for optimizing operations led her to transition into the Aerospace industry. She joined a prominent Aerospace distribution company, where she excelled in stock counts and audits. Alicia dedicated three years to this company, consistently demonstrating her aptitude for inventory management. By the end of her tenure, she had assumed the role of an inventory planner in operations, responsible for managing international and domestic inventory.

As the procurement coordinator at H.E.R.O.S. Inc, Alicia continues to leverage her extensive experience and expertise to support the company’s procurement operations. Her role involves coordinating and optimizing the procurement process, ensuring timely and cost-effective acquisition of goods and services. Alicia holds an Associate of Arts (AA) degree in Communications, which has further enhanced her interpersonal and communication skills.

Tyler Grove

Tyler Grove

Senior Accountant

[email protected]
(480) 536-9207 ext. 102

Tyler is a seasoned professional serving as a Senior Accountant at H.E.R.O.S. Inc. Hailing from Nebraska, he brings a wealth of experience spanning five years in multiple industries, ranging from manufacturing to corporate hospitality.

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With a keen eye for detail and a strong analytical mindset, Tyler excels in navigating complex financial data and identifying key trends and patterns. He leverages this expertise to develop comprehensive budgets, forecast financial outcomes, and provide recommendations for improving profitability and operational efficiency.

As a Senior Accountant Tyler continues to make significant contributions to the financial stability and growth of the company. His expertise in budgeting, financial analysis, and strategic planning positions him as a trusted advisor and a valuable asset to the organization.


Tarmin Sidharta

Tarmin Sidharta

Quality Administrator

[email protected]
(480) 536-9207 ext. 107

Tarmin is a dedicated and analytical professional currently working in our Quality department, specifically handling logs and records, work order reviews, and creating invoices. With a strong background in customer support and maintenance planning.

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Tarmin holds a Bachelor of Science degree in Industrial Engineering from Trisakti University in Jakarta, Indonesia. This educational foundation has equipped him with a solid understanding of engineering principles and methodologies that he applies to his work at H.E.R.O.S. Inc.

With a keen eye for detail, Tarmin is well-equipped to handle the logs and records, work order reviews, and invoicing responsibilities in the Quality department. His dedication to accuracy and his analytical approach ensure that processes are streamlined and adhered to, contributing to the overall quality and efficiency of the company’s operations.

Want to Join Us?

We are a great company to work for, but becoming part of the team isn’t easy.

We do our interviews differently than any other company.  Because we invest a lot in you and believe in your longevity with our company, we are selective about who joins our crew.