Key Staff and Contact Info

MACTEC Radiological Services are involved in projects throughout the United States. Three primary offices are augmented by staff in many locations. Contact the office nearest you, or simply call our headquarters in Colorado and we’ll direct you to the appropriate staff.

Grand Junction, CO     970-243-2861

Kennesaw, GA     770-421-3400

Portland, ME     207-775-5401

Our leadership comprises health physics and radiological professionals with broad and deep technical skills, comprehensive knowledge of regulatory and industry requirements, and more than 150 years’ combined project experience. Select by name for detailed contact info.

Steve Rima, CHP, CSP
Director of Radiological Services

Jeff Lively, CSP, RRPT
Senior Principal Health Physicist / Chief Scientist

Art Samiljan
Principal Health Physicist / Radiological Engineer

Heath Downey, CHP
Health Physicist / Radiological Engineer

Alex Lopez
Health Physicist / Radiological Engineer

Mike McDonald, CHP, RRPT
Health Physicist / Radiological Engineer

Javid Kelley, CHP
Senior Health Physicist

Mike Marcial
Principal Project Manager