SREI's has expertise in structuring public private partnerships, transaction advisory, financial advisory, project development and management, he said.
Arinma was started in 2008 to work with international business partners and provide services.
SREI is a 23 year old firm which has which also has a joint venture with Europes BNP Paribas to provide equipment leasing services in India.
"Post-war Sri Lanka is currently experiencing an unprecedented boom in construction and large scale development projects all across the country," chief executive of SREI Infrastructure Advisory Group, R. Mandal said in a statement.
The collaboration is targeting opportunities in advisory, equipment rental for the construction and healthcare sectors, and also, road and rail-related development and IT enables services for industrial parks and tourism-related facilities.