Excellere
Construction, LLC

Antonio Valdivieso is currently serving as Chief Estimator at Excellere Construction with over 20 years of general experience in the construction industry in the United States and Colombia. Half of this experience has been in road construction projects. He specializes in estimating and construction management, he has developed a robust skill set that supports his role. Holding a BA in Civil Engineering, three master’s degrees (Construction Management from Georgia Tech, Civil Engineering from Kennesaw State University and MBA, Los Andes University) and a certification in Project Management Professional (PMP). He joined Excellere in 2020 and worked as Project Manager for two and half years, then he transitioned into the role of Estimator where he improved his proficiency in cost analysis and budgeting. During this time, he successfully managed numerous high-profile projects, which allowed him to improve his estimating techniques and tools. His commitment to accuracy and efficiency led to his promotion to Chief Estimator. In his current role, he oversees the estimating department, guiding strategic planning and ensuring precise bid submissions. Outside of work, he has been happily married for almost two decades and he is a proud father of a 14-year-old boy. He values spending quality family time, whether it’s enjoying outdoor activities, attending his son’s sports events, exploring new places or simply relaxing at home together. On Sundays, he enjoys attending church, which offers him a sense of community and reflection.

Mustafa Aldelemi is a Project Manager holding a bachelor’s degree in civil engineering from the American University of Madaba and a master’s in management from the European University of Madrid.

Monét Taylor graduated from both Wesleyan College and Auburn University as a dual-degree civil engineer. Since 2021 she has served the roles of both estimator and project manager with Excellere Construction. Her projects typically specialize in complex walking paths and boardwalks off grid. Her most notable projects include Battlefield Trail II in Dallas, GA, which consists of over 4,000 LF of boardwalks and Chattahoochee River Trail in Mableton, GA, which consists of over 2,400 LF of aggregate exposed sidewalk. Monét Taylor is passionate about the environment, global studies, and social justice. When not in the field or office, Monét enjoys exploring other countries, learning about other cultures, and getting in touch with nature. Monét is always eager to see what the next project has instore for her and Excellere. Please see her contact information below: monett@excellere-ga.com

Renato is a Civil Engineer from Michigan State University and holds an MBA from Georgia State University. With a specialization in construction, he has successfully led numerous multi-million-dollar streetscape & roadway projects across the Metro Atlanta area. In his roles as Program and Project Manager, Renato has worked closely with a range of governmental agencies, delivering multiple high-impact infrastructure improvement projects. His journey began far from the jobsite. Born into a nomadic lifestyle shaped by his father’s career in the gold mining industry. Renato lived across seven countries before beginning his formal education, fostering not only adaptability but also fluency in both English and Spanish. His multicultural background has deepened his appreciation for diverse perspectives and strengthened his ability to connect with people across the continent. From an early age, Renato was captivated by how the world is built. With an innate curiosity and a problem solver’s mindset, he has always sought to transform challenges into streamlined, efficient processes. Today, with his years of experience in the construction industry, both in the field and in leadership roles, he has only reinforced a simple truth: Every project carries its own unique kind of magic, and every day offers new lessons to be learned, from the work itself and the people involved.

Semha Alamin is a Project Manager at Excellere Construction with over eight years of experience delivering commercial and road construction projects across the United States and Ethiopia. She holds a BA in Civil Engineering from Addis Ababa University, earned in 2016, and has passed the FE demonstrating a strong technical foundation that supports her project leadership. Since joining Excellere Construction in 2023, Semha has grown from Estimator to Project Manager, applying her knowledge of bid documents, subcontractor agreements, and quantity takeoffs. Her attention to detail and rigorous work ethic played a key role in securing major contracts for the company. In her role as Project Manager, she successfully led the $2 million boardwalk replacement for the City of Alpharetta’s Big Creek Greenway, utilizing innovative top-down construction techniques with helical piers. She also managed the construction of a prefabricated bridge for the Cricket Frog Trail. Currently, she is overseeing a $12 million intersection improvement project on Mount Vernon Highway for the City of Sandy Springs, closely working with the City, utility companies, and subcontractors to ensure smooth coordination, timely progress, and quality execution In addition to her engineering credentials, Semha holds an MBA in Marketing Management, which enhances her ability to communicate across teams and take a strategic view of project goals. Outside of work, Semha is a proud mother to her baby boy and finds joy in watching him grow. She also enjoys traveling, discovering new restaurants as well as attending sporting events in her free time.

Amanda Dib is a Field Engineer at Excellere Construction with 1 year experience in roadway construction. She graduated in May 2024 with a Bachelor of Applied Science in Civil Engineering from Queen’s University in Kingston, Ontario, Canada. Since joining Excellere in April 2025, Amanda has been a part of the $12 million Mount Vernon Highway intersection improvement project for the City of Sandy Springs. Her core responsibilities include managing and scheduling subcontractors, coordinating closely with utility companies, and supporting the implementation of updated traffic signal systems. Her attention to detail helps keep field operations organized and efficient. Outside of work, Amanda enjoys traveling to new places, playing tennis and spending time with friends and family.

Rozy Nara holds a Bachelor's degree in Civil Engineering from India and a Master's degree in Landscape Architecture from Germany. Her academic foundation blends technical engineering expertise with creative design knowledge, providing a unique approach to complex projects. With over 10 years of professional experience as a Project Engineer and Estimator, Rozy has worked on a variety of civil engineering projects across the United States, India, and Europe. Her specialization includes heavy civil construction, underground utilities (water, sewer, and storm drainage systems), and large-scale infrastructure developments. Rozy is known for delivering efficient, sustainable, and cost-effective solutions that align with project goals and regulatory standards. Outside of her professional life, Rozy is passionate about traveling, painting, and playing sports. These activities fuel her creativity, help her explore diverse cultures, and contribute to her balanced and active lifestyle