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Cliff Kirkmyer is the managing member of GC3 Consulting.

Cliff has over 40 years experience in the construction materials field. 


Most recently he was Executive Vice President of Resources & Performance and served as interim Vice President/ General Manager East Region for Cemex Construction Materials. Prior to this position, Cliff held the position of President of Rinker Materials Aggregates East Group which consisted of 53 construction aggregate facilities in 6 states with a total volume of over 65m tons annually.

At both Cemex and Rinker, Cliff had full P&L responsibility for all operating aggregate sites as well as marketing, technical, environmental, transportation and distribution of products and services totaling over $700M in total revenue.

Added responsibilities included management of recycled aggregate ventures, joint venture relationships, development and execution of the company's off-shore and on-shore aggregate supply strategy, community relations, mine planning, engineering, procurement, and organization development.

Download Cliff's CV

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GC3 Consulting provides management consulting, business advice and direction for construction materials businesses, including:

  • Strategic development
  • Logistics
  • Marketing
  • Distributions plans
  • Operational improvement
  • Sales evaluation
  • Merger and acquisition
  • Divesture assistance
  • Organizational development
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GC3 consulting provides business advice to a variety of firms.

Some recent clients include:

  • Nally and Haydon
  • Northern Companies
  • Palm Beach Aggregates
  • Quikcrete Companies
  • Rogers Group
  • SDI Aggregates
  • Siboney Contracting
  • Aggregates USA
  • Bluegrass Materials
  • Blue Water Industries
  • Cemex
  • Earth Materials Holding
  • Genesee and Wyoming Railroad
  • King William Sand & Gravel
  • Maritime Marine
King William Sand & Gravel,  Queenfield Mine, Manquin, Virginia

King William Sand & Gravel, Queenfield Mine, Manquin, Virginia


Email: cliff.kirkmyer@outlook.com

Phone: (561) 373-3126

Address: 255 Old Meadow Way                                                                                 Palm Beach Gardens FL 33418