Andrew Ross combines executive leadership with deep technical expertise to drive product innovation and operational excellence within Centek. As MD in the UK and Global VP of Engineering, he plays a pivotal role in aligning Centek’s engineering, manufacturing, and product strategy across global operations to deliver reliable, high-performance centralization solutions to the oil & gas industry.
John combines technical expertise in cementing and casing tools with a strong commercial understanding of global energy markets. He is passionate about driving product excellence and helping operators improve well integrity through advanced centralization solutions. Based in Oklahoma, John works closely with Centek’s regional teams to align engineering, marketing, and customer support under a shared vision of performance, quality, and reliability.
With deep roots in the energy sector—from his early days as a Driller and Rig Manager to progressing through roles as an Account Manager and ultimately Regional Sales Manager, North America, Chase Davis brings both hands-on operational insight and strategic customer engagement to Centek. This unique combination ensures he not only understands the technical challenges operators face downhole, but also excels at aligning Centek’s engineered solutions—like S2 centralizers—with operational needs.
With nearly six years of proven leadership at Centek Group since October 2019 in Bogotá, Lorena Hernandez brings a powerful blend of sales excellence, customer satisfaction focus, and deep operational insight to her role overseeing Latin American and Mexican markets. Prior to joining Centek, she spent over seven years as a General Field Engineer at SLB, honing her expertise in field operations and sales processes.
With over 15 years of experience in cementing, drilling, and well construction, Gustavo brings deep technical knowledge and operational expertise to the team. A qualified Chemical Engineer from the Universidade do Estado do Rio de Janeiro, he previously worked as a Wellsite Supervisor III on the Petrobras Integrated Project in the Búzios field. Gustavo’s experience in both offshore and onshore operations, combined with his commitment to safety, innovation, and customer success, strengthens Centek’s ability to support customers across Brazil.
Michael Kowalczyk leads Centek’s business across the Middle East, bringing more than 15 years of experience in commercial leadership, international business development, and strategic account management within the energy sector. Throughout his career, he has managed complex regional operations, strengthened market presence across multiple countries, and built long-standing relationships with operators and service companies.
Stuart brings over two decades of experience in the oil and gas industry, with a strong technical foundation in welding, fabrication, offshore drilling, and subsea engineering. Since joining Centek in 2004, Stuart has progressed through multiple roles, from European account management to overseeing key markets across the Middle East and Asia Pacific. His deep understanding of well construction challenges and commitment to customer support have been instrumental in expanding Centek’s global reach.
Shaun is a highly experienced industry professional with a deep understanding of oilfield operations, engineering, and customer service. Over his career, Shaun has built a strong reputation for delivering technical excellence, fostering long-term partnerships, and driving performance improvements across multiple regions. Shaun’s practical expertise, combined with his focus on collaboration and continuous improvement, ensures Centek continues to set the standard for quality, reliability, and excellence in every project.
Rugaya brings over a decade of experience in both technical and commercial roles within the oil and gas industry. Based in Kuala Lumpur, Rugaya holds a Master’s in Manufacturing Management from Universiti Kuala Lumpur and has expertise in contract management, project leadership, and strategic business development. She is dedicated to delivering tailored solutions and strengthening customer relationships across diverse markets. Rugaya’s analytical mindset and passion for innovation play an important role in advancing Centek’s performance and regional growth.
Rusydi is an Applications Specialist, supporting customers across the Asia Pacific region with technical expertise in centralizer selection, simulation, and testing. With a strong background in casing equipment coordination and operations management, Rusydi has extensive experience working with regional and international drilling projects. He plays a key role in ensuring Centek’s customers achieve optimal well performance and integrity through precision engineering and reliable product application.
Sam brings extensive experience in oilfield operations, sales, and customer support, with a strong focus on cementing and well construction performance. Over his career, Sam has worked closely with operators and service companies across the United States, building trusted relationships through his technical knowledge and hands-on approach. His background includes field operations, product application, and regional sales, giving him a deep understanding of customer needs in both onshore and offshore environments.
Chris has over 15 years of experience in oilfield sales, business development, and customer relationship management. Based in Texas, Chris has a strong background in supporting drilling operations and delivering reliable solutions to meet complex well construction challenges. His hands-on industry experience and customer-first approach ensure operators across the region receive the highest level of technical and commercial support.
Marcel supports customers across Sub-Saharan Africa with expert guidance on centralizer selection, placement, and performance optimization. With over a decade of experience in the oil and gas sector, Marcel brings strong technical and commercial expertise gained through roles in sales engineering, drilling operations, and product support. His background in managing projects across West and Central Africa gives him deep regional insight and a strong understanding of customer challenges.
As Engineering Manager Andy leads the design and development of Centek’s advanced centralization technologies. With nearly two decades of experience at Centek and a strong background in mechanical engineering, Andy oversees the full product lifecycle — from concept and simulation through to testing and field validation. In addition to his leadership role, Andy is also an Applications Specialist, regularly travelling to customer sites worldwide to provide hands-on support and guidance on testing protocols.
Marius is an Applications Specialist, providing expert technical support to customers around the world on centralizer selection, placement, and performance. With many years of experience in the oil and gas industry, Marius combines deep engineering knowledge with practical field insight to help operators achieve optimal well integrity and efficiency. His global experience and customer-focused approach make him a trusted partner in ensuring the successful deployment of Centek products in even the most challenging well environments.
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