The phrase "a secondment at" is correct and usable in written English.
It is typically used to refer to a temporary transfer of an employee to another position or organization, often for training or experience.
Example: "She is currently on a secondment at the London office to gain international experience."
Alternatives: "a temporary assignment at" or "a placement at".
In January, Kopec started a secondment at the London Organising Committee of the Olympic Games, which is a private company.
Her daughter had been due to return to the US after finishing a secondment at ICI in Slough.
Hogan-Howe was on weekend leave in Sheffield from a secondment at Oxford University on 15 April 1989, when the lethal crush happened at Hillsborough.
After a year on secondment at the Government Economic Service, I took up the role of head of the College of Business, Economics and Law at Swansea University.
She is currently on a part-time secondment at the Royal Pharmaceutical Society (RPS) as their Chief Scientist.
I did a secondment with the digital team at Number 10 last year and learned a lot from them.
The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2458/14/24/prepub wouldulikeike to thank the Northern Ireland Statistics and Research Agency for facilitating a secondment for JH to the UKCRC Centre of Excellence for Public Health NII) at Queens University, Belfast.
The person on your left is on secondment at a big oil company; on your right sits a woman who between spells at the finance and defence ministries has picked up degrees from the London School of Economics, Cambridge and Stanford.
Previously, Taylor practiced corporate securities and competition law at Goodmans LLP, including a secondment to the Ontario Securities Commission.
So I went to work as a learning and teaching consultant for Lincolnshire council and that's when the job at Long Sutton came up, originally as a secondment.
He had been on a secondment with MI6 from his job as a communications officer at the GCHQ "listening post" in Cheltenham, Gloucestershire.
