The companies have been working together for the best part of five years on a project-by-project basis, but have now signed an international agreement that will see them collaborating on joint software and services.
"We are going to work with our partners to expand our market share," said Chris Rotfey, BEA's strategic alliance manager.
Under the agreement EDS will recommend BEA products - such as its flagship WebLogic application server - to its clients. EDS may also simply resell the BEA products.
The agreement is a lucrative deal for BEA. Last year it generated $15m (£10m) as a result of local agreements with EDS and, Rotfey claims, this year that figure will grow.
EDS declined to comment on the financial value of the deal, but Chris Moyer, the company's chief information officer for the UK and Ireland, said: "This is one of the largest technology contracts [we have], one of those top-tier relationships."
EDS also has "top-tier" relationships with Sun Microsystems and Microsoft.
Partners are very important for BEA. Rotfey stated that two thirds of all the company's revenues are "touched" by its partners in some way.
EDS' Moyer commented: "I don't know too many [companies] who have been successful only using their own products, with the exception of one, and we all know who that is."
In addition to EDS, BEA also partners with CSC, Accenture, PricewaterhouseCoopers, KPMG, Andersen and Deloitte & Touche.