Bank of America investment banker and former Green Beret dies 'from natural causes' after joining firm following military career

A Bank of America investment banker and former Green Beret has died, the bank said on Monday.

Leo Lukenas III, 35, died of natural causes on Thursday, according to the New York Office of the Chief Medical Examiner.

The married Brooklyn resident and father-of-two died of 'acute coronary artery thrombus,' the office said. 

The disease causes the formation of a blood clot inside a blood vessel of the heart.

Lukenas' stepmother told DailyMail.com the family was 'devastated' by the loss.

Former Green Beret and investment banker at Bank of America Leo Lukenas III, 35, died on Thursday. He is survived by his wife and two children.

Lukenas is survived by his parents, wife and twin brother Les, who is also a Green Beret

Lukenas is pictured with his mother

Lukenas served as a Green Beret for a decade, according to his family

Bank of America said 'our focus is on doing whatever we can to support the family and our team, who is devastated.'

The associate was part of the financial institutions group (FIG) team that advises bank clients on deals, according to a source familiar with the situation, and was also a former member of the US Green Beret special forces.

Lukenas' stepmother told DailyMail.com the family was 'devastated' by the loss 

Lukenas spent 10 years in the military and started working at Bank of America a little over a year ago.

Originally from California, he started at the bank through the Veteran Associate Program. 

On LinkedIn, he described himself as an 'Investment banking associate leveraging a decade of experience as a Green Beret leading high-performing teams in volatile, complex, and ambiguous environments.'

Lukenas is survived by his parents, wife, son and daughter, and twin brother Les, who is also a Green Beret. 

A donation page was opened in honor on Tuesday with a goal of $1,000,000. 

The page reads: 'Leo Lukenas was a son, brother, husband, Green Beret, and most importantly, a father. 

A donation page was opened in honor on Tuesday with a goal of $1,000,000. He is seen with his mother and brother

Lukenas married his wife in 2015 in a wedding in Florida

Les and Leo Lukena are pictured above. Both served as Green Berets

'He spent over a decade in Army Special Operations, deploying multiple times with 1st Special Forces Group. 

'Leo was dedicated to everything he did, never settling for good enough. He always set the example and held himself to the highest standards, prioritizing the team and mission success over himself. With the heart of a lion, Leo always fought to defend what was right.

'Leo transitioned out of the military to pursue new opportunities for his family. Now, in remembrance of Leo, it's our duty to support his family just like he would have done for all of us.'