Armstrong Consultancy Serices LTD
pipe and valve


Working in the UK and Internationally

Commercial Management Solutions
Dispute Avoidance
Dispute Resolution
Contractual and Commercial Awareness Training

‘Consummate professionals at all times, they have years of commercial and dispute experience. Whether you want commercial risk support or dispute management solutions, they represent  a safe pair of hands in an uncertain world’.



Dave Armstrong –

Dave is a Chartered Quantity Surveyor  and has worked for over 35 years within the energy sector.  ACSL clients know that they can rely upon Dave to give calm, no nonsense advice  and work on their behalf with the utmost integrity, diligence, and professionalism.  He is a qualified Mediator and Expert Witness and regularly works alongside  lawyers and other experts in a variety of legal forums.

Dave is also a Non Executive Director of NOF Energy the Business Development company based in Durham.



Lindsey Armstrong-

Lindsey is a qualified solicitor who has worked over a number of years in management, focussing on business development, contracts management, quality management and in the development and delivery of a variety of training courses from foundation to post graduate level.  Lindsey has recently added an MBA (Enterprise) to her qualifications and is now heading up the provision of bespoke in house training  for new and existing clients including a full range of commercial awareness skills, and those required for effective contract management. Feedback has been extremely positive suggesting that the training toolkit ACSL uses results in a measurable difference for the project and operational teams who have attended ACSL’s workshops.

Our network of Expertise

ACSL has built up a trusted network of  consultants with wide and varying technical expertise. This network regularly collaborates on larger assignments as circumstances dictate and clients demand. If you do not see the specialist expertise you require, we will happily source that expertise on your behalf.