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Custom Contracting, Ltd.           21020 North Rand Road, Suite D, Lake Zurich, Illinois 60047-3006           Phone: 847.438.2777  

Leon LaJeunesse, Founder and President
Management TeamAffiliations

Leon LaJeunesse, Founder and President
Leon's vCard

Leon LaJeunesse, Founder and President of Lake Zurich, Illinois-based Custom Contracting, Ltd., serves as the chief operating officer of the business, is very
Donna LaJeunesse, Vice President

Donna LaJeunesse, Vice President-Administration for Custom Contracting, manages the human resources, legal, information technology, and accounting functions
active in local and national professional organizations, and has a strong commitment to promoting sustainable practices within the construction industry.

LaJeunesse began his career as a millwork apprentice in Chicago and after a few years of increasingly responsible positions founded his own business, Custom Contracting Ltd., in 1987. As president of Custom Contracting, he manages all key personnel and core operations.
for the company. As a member of the senior management team, she focuses on continuously improving Custom Contracting’s service delivery and client satisfaction, playing a key role in systems management and in ensuring the company meets and often exceeds industry standards for work quality and safety.

Donna works closely with the project management and estimating teams and with corporate advisors on legal, accounting, and finance issues. She also participates in pricing and contract negotiations for the company. In her role as head of human resources, Donna is particularly interested in fostering a work environment where individuals can make meaningful contributions, develop and refine their existing talents, and acquire new knowledge and skills to advance their careers. 

Donna is an active member of industry organizations including the Builders Association, a local chapter of The Associated General Contractors of America; and the Risk, Insurance, Strategic, Claims Management Association (RISCA). A lifelong learner, Donna has studied management and business disciplines at Northeastern University, Wilbur Wright College, Triton College, and the College of Lake County all in Illinois.
Robert Giannosa, Vice President
Robert's vCard

Robert Giannosa, Vice President, has primary management responsibility for corporate and client engagements including safety, tools and equipment,
business development, trade labor coordination, and field personnel. In this position, Robert leverages his in-depth knowledge of building code requirements, mechanical and electrical building systems, construction processes, methods, and technology. He also oversees project management, purchasing and subcontract agreements, change orders, cost reports, and communication with owners and architects of client projects.

Robert’s career in the construction industry continues a family tradition begun by his father and launched his career in the commercial end of the carpentry trade upon graduation from Triton College and Washburn Trade School in Chicago. His early experience included projects for some of Chicago’s largest corporate entities serving as foreman and superintendent. Prior to joining Custom Contracting, Robert served as Senior Facility Engineer for Motorola. 

A lifelong learner, Robert continues to pursue continuing education in project and people management, regulatory standards, and health and safety issues. He is a member of the Builders Association, the local chapter of the Associated General Contractors of America and the Healthcare Engineers Society of Northern Illinois, the local chapter of the American Society for Healthcare Engineering (ASHE). His has earned the ASHE Health Construction Certificate and OSHA certification in safety and health.
Donna LaJeunesse, Vice President
Robert Giannosa, Vice President
LaJeunesse’s industry involvement and service has included leadership roles in the:

  • U.S. Green Building Council, Chicago Chapter
  • Lean Construction Institute, Chicago Community of Practic (LCI Chicago COP)
  • Builders Association, a local chapter of The Associated General Contractors of America
  • Builders Education and Training Foundation
  • College of Lake County Construction Management Technology Advisory Committee
  • Construction Industry Service Corporation (CISCO)
  • Mid-America Regional Bargaining Association Carpenter Craft Committee (MARBA)