About Us

Executive Management Team

Siebe van der Zee, President – Siebe Vanderzee is an international management consultant with more than 20 years of experience in retained executive search, executive performance coaching and cross-cultural consulting. His clientele includes large multinationals corporations as well as medium sized companies, covering multiple industries.

Finding the best talent for the right position; assessing human behavior in a global perspective, Siebe has a strong passion for executive search. Based on guiding principles of integrity and confidentiality, he has developed a wide network of contacts and connections in a variety of industries, throughout the United States and abroad. His expertise is in senior level search assignments in Technology/Semiconductor; Sustainable Energy/Solar; Cybersecurity/Software; Healthcare/Life Sciences and Consumer Products.

Siebe has a well-established record coaching corporate executives to help them elevate their business performance. From fine-tuning existing skills such as teambuilding and problem solving to dealing with advanced cross cultural challenges and executive career transition. Siebe is certified by Enhanced Performance Systems as executive performance coach applying The Attentional & Interpersonal Style inventory (TAIS).

Born and raised in the Netherlands, Siebe began his career with Citibank in Amsterdam and subsequently with ING Bank in London, Montevideo and New York. From there, he started his global consulting practice in Scottsdale, Arizona. Since 1992, Siebe serves as Honorary Consul of the Netherlands in Arizona. He holds a Master’s Degree in International Management from the Thunderbird School of Global Management. He has lived and worked in four countries on three continents.

Jeffrey Luth, Managing Director – Jeff has worked closely with senior decision makers for more than 30 years, and over the past two decades he has interfaced extensively with high technology companies. He combines exceptional communication skills with an uncanny ability to synthesize information and articulate the “Story”. He is adept at reaching audiences, building relationships and influencing stakeholders. Jeff’s extensive experience and impeccable reputation allow him to effectively work with colleagues across business, academia and government. As a New York-based corporate banker and financial communications consultant, Jeff built and managed relationships with a wide variety of domestic and international clients.

After relocating to Arizona, Jeff served for 8 years as Vice President, Corporate and Investor Communications at Amkor Technology, a global semiconductor company, and for 5 years as Industry Liaison at Arizona State University. He also became widely recognized as one of Arizona’s thought leaders in support of renewable energy. Jeff has been a member of the SEMI Arizona Steering Committee for over a decade and has been Chair of the Materials Research Society’s Industry Engagement Council for the past three years. Jeff holds a BA in International Studies from Rutgers and is an accomplished photographer.