K Alexander Stewart 

C.Chem. F.R.S.C. M.I.M.M


Mr K. Alex Stewart (1934 - 2018) founded the Alex Stewart International organization in 1978 after first gaining extensive experience in all aspects of sampling and assaying. Advancing from basic laboratory duties, Alex Stewart went on to gain a First Class Honours degree in chemistry and become an Associate and Fellow of the Royal Institute of Chemistry. Alex Stewart has more than 64 years of experience in the metal business. Alex Stewart was at the vanguard of developing modern assaying techniques and undertook research works in Atomic Absorption Spectroscopy as a new analytical method, especially for the determination of gold and silver.

While working at Alfred H. Knight, he introduced the company to the full Platinum Group Analysis associated with both Atomic Absorption and Fire Assay techniques. In 1967 Alex Stewart became a Director of Alfred H. Knight and was largely responsible for the worldwide expansion of the company during the next decade.

In 1977 he started his own companies Alex Stewart Assayers Ltd and AS Metallurgy Liverpool Ltd and built up a highly successful inspection and laboratory business in Knowsley, Liverpool. He continued putting his knowledge of the metal business, managerial and people skills toward building up the network of other Alex Stewart companies to become one of the leading independent inspection and metal assayers in the world, acknowledged and accredited by reputable and well known metal institutions such as IPMI, LME, BIR and LBMA. In 2004, Alex Stewart Agriculture was merged by acquiring the A. Norman Tate and Huson and Hardwick Laboratories to provide GAFTA, FOSFA and UKAS accredited analysis for soft commodities such as grains, oilseeds, oils and fats to traders, millers, refiners and farmers mainly in Argentina, Brazil, Chile, India, Indonesia, Malaysia, Peru, Thailand, UK and the Ukraine. In 2010, AS International’s specialist metal laboratory became the newest partner to provide inspection and analytical services to the metal industry and became the business hub of the Alex Stewart International network of inspection offices.

In 2013, Alex Stewart expanded its metallurgical, inspection and analytical services with the incorporation of a new metals laboratory located in Sefton Business Park, Liverpool, England, and from August 2016, trades as AS International Corporation Ltd

Alex Stewart was a lifelong supporter of Liverpool Football Club and  proudly witnessed the club win an almost unparalleled 56 major trophies.

Graham Stewart

BA Hons, Dip mgt

Executive Director

Graham Stewart has been involved in a wide range of aspects of the Company initially working within the inspections division for bulk ferrous and non ferrous metals, and then also for consignments of precious metals. He is a graduate in Business Management, and also speaks Spanish and Portuguese. Business organisational skills include governance, financial and legal, website optimisation, digital marketing, sales and acquisitions. He recently led the project for building ASi’s newest laboratories in Liverpool. Graham has travelled and worked extensively in South America and helped the company diversify into the geochemical business in South America enabling exploration analysis for mining companies and then in more recent years developing agricultural inspections on the South Atlantic Coast from both Argentina, Brazil and Uruguay. Since 2004 he has also directed the group’s diversification into the soft commodities and food testing business – Alex Stewart Agriculture and Alex Stewart Food Test Lab.

Dr. Enrique Segura

Executive Director

Dr. Enrique Segura has held top executive positions within the financial and service sectors for the past twenty years and has extensive experience working with governments and managing large international companies. Dr. Segura was the president of SWIPCO, U.S.A., an international company providing procurement services to governments. He has also served as president and chief executive officer of ICS Inspection and Control Services Ltd., a company established to provide governments with services designed to increase their customs revenues, and, an Internet company that provides comparative price information, price research and data mining services to members through its Web site. He has worked as an economist for the Inter-American Development Bank and as a financial officer for industrial sector projects for the World Bank. Dr. Segura was also the chairman of the Trust for the Americas and, since 1996, the Honorary Consul of the Republic of Uganda in Argentina. He holds a Ph.D. in Business Administration and MBA.

Erwin Flores

Executive Director

Erwin Flores has more than 25 years of professional experience, including 20 years in the management of governmental projects. He was executive vice president of SWIPCO USA, an international company providing procurement services to governments. A senior advisor to the president of the company, Mr Flores was chiefly engaged in the development of company programs. He has also served as executive vice president of ICS Inspection and Control Services Ltd., a company established to provide governments with services designed to increase their customs revenues, and of, an Internet company that provides comparative price information, price research and data mining services to members through its Web site. Prior to that, Mr Flores was responsible for the development of spacecraft operations systems for NASA and INTELSAT. He holds a degree in physics

Our Business

Founder and Directors


Meeting your contractual specifications, protecting your business
Founder and Directors


Delivering the most precise and prompt assaying and analytical services
Founder and Directors


Providing a broad range of trusted services for government agencies

Our Locations 

A Global Network

ASI Inspections, Loads and Discharge Operations

ASI Laboratory, Sample Preparation and Customer Services

ASi Government Business Head Quarters

Translate »