The Team

The Team

More than a century of experience exists in DeltaTek’s leadership team. This experience is supported by a growing team of highly skilled engineers, business development professionals, operations leads and administration support staff.

Tristam Horn


On graduating from university with a master’s in engineering, Tristam steadily progressed through various drilling engineering and supervisory industry roles at BP and Ophir Energy. Identifying problems, he saw a gap in the market. Tristam founded DeltaTek in 2015 which led to the development of SeaCure®, an industry-first technology.

Dave Shand

Chief Operating Officer

Dave has a BSc in Engineering Technology and over 40 years oilfield experience, 25 of which have been served in senior management and board positions. Dave has global oil and gas experience, working with the likes of Dowell Schlumberger, Petroleum Engineering Services Limited (PES), WellDynamics, Expro and STATS Group. Prior to joining DeltaTek, Dave has worked with SME’s, supporting them to bring new technology to market.

Steve Bruce

Chairman and Chief Technology Officer

Steve has over 40 years of industry experience, including over two decades with Schlumberger. Starting his career as a Field Engineer, Steve rose through the ranks, and has held a number of management and director positions around the globe. Steve held the Chief Executive position of Darcy Technologies for 6 years, until Halliburton’s acquisition of the company. Since then Steve has led start-up businesses, bringing new technology to market.

Lori Angus

Office Manager

Lori started her career at working as an office assistant in the property industry, before joining Aberdeen City Council hackney office and garages for over 5 years. Lori then worked as an office assistant at Taylors Industrial Services before joining DeltaTek. Lori’s role involves managing the administrative aspects of the business including sales, finance and working directly with and providing support to the company directors.

Chris Johnstone

Operations Manager

Starting his career as an Operations Engineer at Stork Technical Services, Chris boasts nearly a decade of experience working as a Drilling Engineer with LR Senergy, AGR and Enquest, before joining DeltaTek as an Operations Supervisor in 2018. Chris has been promoted to Operations Manager.

Jonas Taverne

Senior Service Supervisor

Jonas completed an HND in Electrical and Electronic Engineering at North East Scotland before graduating with BSc Hons Electrical Engineering from Robert Gordon University.

Alex MacGill

Senior Service Supervisor

Alex started his career as an Electro-mechanical Maintenance Apprentice, Drilling Services, at Baker Hughes, completing his modern apprenticeship in 2016 and obtained an HNC in Mechanical Engineering. He continued his career with Baker Hughes, as an Electro-Mechanical Maintenance Technician, Drilling Services. Alex brings skills in both electrical and mechanical maintenance.

Gerry Cantwell

Workshop Supervisor

Gerry is a time served Mechanical Engineer with more than 30 years’ experience in the oil and gas industry, including petroleum engineering services, intervention and smart completions roles. Gerry has previously worked for STATS, Baker Hughes Inteq, Teleco Sonat and Dril-Quip in both engineering and supervisor positions. Gerry’s role at DeltaTek includes managing the workshop, maintaining, testing and deploying tools and ensuring training technicians.

Gregor McLellan

Design Engineer

On completing his secondary education, Gregor spent two years working in the French/Swiss Alps at a hotel. On his return to Aberdeen, he studied Mechanical Engineering at the University of Aberdeen. During his third year of University, he joined DeltaTek on a summer internship. Gregor went on to complete and graduate his degree in 2020 and has joined the DeltaTek team on a full time basis as a Graduate Engineer.

Mark Elder

Senior Business Development Engineer

Mark has a degree in mechanical engineering from NESCOL and a Business Management MA (Hons) from the University of Aberdeen which introduced him to the world of business and business development. Mark’s role at DeltaTek involves him working with clients to identify the right solution for their problems.

Christopher Cadiz

Service Supervisor

Chris joined the oilfield in 1977 in the Republic of Trinidad and Tobago, working for Dowell Schlumberger. He continued to work for Schlumberger in the UAE, Egypt and Saudi Arabia, then back to Trinidad before moving to the UK in 1995. In 2017, Chris started to work for Halliburton again as a contractor until 2019 and then joined DeltaTek.

Vernon Hay

Service Supervisor

Involved in Oil & Gas for 33 years, Vernon spent 15 years as staff and three years consulting for Vetco Gray/GE Oil & Gas prior to joining DeltaTek.

Anniha Razak

Office Administrator

Responsible for maintaining training records, updating relevant training management systems, Anniha undertakes accounting duties and complying DeltaTek’s HSE protocols.

Rory Cadenhead

Workshop Technician

Focussing on building, taking apart and rebuilding drilling tools which assist in cement placement, Rory’s role at DeltaTek is varied.