What is the fine-grained topic of the following text: Mr. Karl also served as Executive Vice President of Shopping Center Management for the Westfield Group between 1996 and 2006 where he was responsible for the performance of all shopping centers in the U.S. portfolio (approximately 70 regional shopping malls), including NOI growth, annual budgeting, long-term forecasting, financial reporting, accounts receivable, capital expenditure programs, the recruiting and development of executive talent, marketing, and new income programs. Only return the topic.
Mr. Karl's role and responsibilities as the Executive Vice President of Shopping Center Management for the Westfield Group.