Rob Hotston


Rob Hotston joined OSACO in 2018 after more than forty years as both an investigator and investigations trainer.

Marc Boodee

New Zealand

Marc Boodee joined OSACO Group in October 2022. Marc had a 28-year career in investigations prior to joining OSACO.

Abdullah Jaghbeer


Abdullah Jaghbeer, with eight years’ experience in investigations, risk mapping and compliance in the humanitarian sector, joined OSACO in March 2023.

Jackson Shewry

New Zealand

Jackson joined OSACO Group in January 2023. Prior to joining OSACO, Jackson had a 17-year career in investigations which included working as a lead investigator on the New Zealand Royal Commission of Inquiry into Abuse in State Care.

Andrée Fayçalline Thes

Côte d'Ivoire

Lawyer, gender expert, and specialist in Safeguarding/Protection, Andrée Fayçalline Thes has more than ten years' experience in promoting gender equality and defending human rights.

Layal Ayass


Layal joined OSACO in 2020. She has spent more than ten years leading investigations around the globe, specifically in the Middle East, Africa, Asia, and Europe. Layal is bilingual (English and Arabic).

Dave Davis


Based in France, Dave is an experienced international investigator who has worked both full-time and as a consultant with multiple UN Agencies and INGOs.

Sophia Guirguis


Based in France, Sophia brings 15 years of experience in the private and humanitarian sectors to her work with OSACO. Sophia has extensive experience in risk management, and an advanced knowledge of the international aid system’s governance, functioning, and challenges.

Laetitia Goli

Côte d'Ivoire

Laetitia Goli is a lawyer, specialising in human rights. She has been a feminist and activist in Côte d'Ivoire for nearly a decade. Laetitia works in partnership with Ivorian civil society organisations and international organisations on issues relating to the rights of women and girls.

Shelley Nisbet

New Zealand

Shelley Nisbet joined OSACO Group in October 2023. Since then, she has been involved in numerous investigations involving allegations of SEAH (sexual exploitation, abuse and harassment). She has also undertaken due diligence investigations pertaining to global companies and high-profile persons of interest.

Consultant Directory

Tamara Shockley – USA
Peter Foley – Ireland
Mick Symons – Australia
Kevin Curtis – USA
Mike Lawson – New Zealand
Mayara Freitas – Kenya
Peter Haynes – UK

Rosa DaCosta – UK
Aurelie Gremaud-Laforet – France
Isabella Hjorth-Falsted – Denmark
Josette Zebi – Côte d'Ivoire
Alain Koffi – Côte d'Ivoire
Lamine Coulibaly – Côte d'Ivoire
Frederic Anderson – Côte d'Ivoire