Certified Commercial Investment Member (CCIM) Prudential Real Estate Referral Network. CCIMs are considered the elite of commercial real estate, sharing a set of skills that puts them far ahead of the competition. The CCIM designation is granted by the Commercial Investment Real Estate Institute (CIREI). CCIMs course topics include financial analysis for commercial real estate, commercial brokerage, advanced techniques in sales and marketing, market analysis, tax planning, decision analysis, negotiation, presentation skills.