Marsh McLennan Agency Marsh McLennan Agency Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Services >> Bond and Surety Marsh McLennan Agency 960 S Broadway Ave Ste 500Boise, ID 83706 | map | directions Justin Gwinn (208) 424-2900 Visit Site Connect With Us Insurance, surety, and risk management programs for regional construction operations. Member Since: 2005