Contact Us


Head Office Telephone: 0800 6128 432


Mobile: 07734 569 549 – Held by Sarah Gallienne


If no one is in the office  to take your call – please do leave a brief message, as messages are picked up regularly  throughout the day – we Guarantee a call back the same day (office hours M- F).



Or if you prefer – you can contact us via email / using the form below. Any emails received are actioned/responded to  same day…. every day.

*All field must be completed.

wales private detective

Why you should Contact Us

SGI Head Office is based in South/West Wales and is comprised of  a formidable team of multi skilled private detectives and investigators that have worked together since the business was founded by Sarah Gallienne in 2008. As the number one Female Private Detective in Wales, Sarah provides a unique service where the operatives are both male and female.

All the staff at SGI are experienced X forces operatives and have a good local knowledge of the geographical areas we work in on a day to day basis including: Bath, Bristol, Bridgend, Cardiff, Aberdare, The Valleys, Merthyr Tydfil, Monmouth, Chepstow, Swindon, Swansea, Neath, Port Talbot, Llanelli, Oxford, Carmarthen, Ammanford, Tenby, Gloucester, Birmingham, Manchester, Liverpool & Haverfordwest.

SGI personnel are all trained in surveillance & Road Traffic Investigations; Experts in tracing missing persons or elusive debtors, we also offer a full GPS tracker deployment service (purchase or hire) at very competitive prices with real time live tracking. We offer a deployment/retrieval service to both clients who hire or buy Trackers from us.

We provide Express No Find/No Fee Tracing Services; Background Checks; Asset Reports; Test Purchases; Bug Sweeps for the who fear their security has been comprimized.

Employee Vetting or Employee Verification; Tenancy Checks; Enquiry Agent/Door Knock Enquiries; Phone Number Traces together with the supply of Store Detectives & Security Guards.

Our work is spread evenly between commercial and private enquiries. We work for insurance companies, solicitors, companies and indeed other private detective agencies when required as well as private individuals so no matter the problem, we are more than qualified to handle it.





Services Include:-

Hire a Private Investigator; Private Detective UK; Covert Surveillance Wales; Professional Investigator Cardiff ; Witness Statements Swansea; CV verification; CFA sign ups Barry; Employees Moonlighting Monmouth; Enquiry Agent Aberdare: Address Verification; Covert Video Intelligence Bridgend; Private Investigations Brecon; PC & Mobile Forensics; Accident Sketch Plans Cross Hands; Locus Inspection Ammanford; Suspected Fraud Cardiff; Llanelli Vehicle Trackers; GPS Tracker Hire Aberdare; Tracing Missing Persons Hirwaun; Commercial Investigations Merthyr Tydfil; Tracing Debtor Milford Haven; Cwmbran Cheating Partner Surveillance; Hire a Private Detective St. Clears; Tracking Assets Carmarthen; Address Verification Neath; Personal Injury Surveillance Swansea; Catch a Cheating Partner Ystradgynlais; Door Knock Enquiries Ystalyfera; Private Investigator UK; Test Purchases Pembroke; Car tracker sales Pontypridd; Undercover Operatives Port Talbot; Aberdare Surveillance on Benefit Cheats; Newport Co-habitation Surveillance; Background Checks; Employee Vetting; Tracking devices for Sale; Port Talbot Static Observations; Haverfordwest Tenancy Investigations; Electronic Vehicle Tracking; Carmarthen Local Authority Investigations; Cardiff; Swansea Status Reports; Pontypridd Car Tracking; West Wales Vehicle Tracking; Monmouth GPS Tracking; Brecon Enquiries; Bristol Marital Surveillance; Aberystwyth Door Knocks; Abergavenny Fraud Surveillance; Merthyr Tydfil Investigations; Neath Accident Investigations; Private Detective South Wales.

Professional Investigator Network
British Agents
 UK Professional Surveillance Network
Approved Private Investigator