“Once a Titan, Always a Titan” is a common slogan at Cal State Fullerton. But for Michael Guillen, the Business Titan identity carries three meanings. In addition to graduating with a B.A. in economics in 2018 and his M.A. in economics in 2023, Guillen is a lecturer in economics today, while also serving as a senior specialist in energy policy and pricing at Southern California Edison.

Looking back at his student days, Guillen points to supportive faculty and staff as essential in his development as a professional and academic. One pivotal moment was during his undergrad principles of microeconomics course with Andrew Gill. “After class one day, he introduced me to the field of forensic economics, a conversation that ultimately guided me toward my first career path,” says Guillen. “A few years later, I took his labor economics course, where my work earned recognition through an award sponsored by the forensic economics firm Formuzis, Hunt and Lanning.”

With this recognition, Guillen became a research associate, then an associate economist for Rizzardi Economic Associates, a San Marino-based economic valuations legal firm. But after three years in the industry, Guillen would return to his alma mater, focused on earning his M.A. in economics.

“The graduate program further strengthened my ability to think critically, solve complex problems, and communicate analytical insights effectively—skills that proved essential as I transitioned into the utility sector,” he says. “The advanced coursework and research opportunities not only deepened my technical expertise but also prepared me for the high-level analytical work I now do at Southern California Edison.”

Since fall 2023, Guillen has been teaching ECON 315 – Intermediate Business Microeconomics to the next generation. In fall 2025, he is teaching two sections of this course.

“I enjoy our diverse, driven, and intellectually curious student body. Many students are balancing multiple responsibilities, and their determination to succeed is incredibly motivating,” he says. “My time as a student here inspired me to pursue teaching. Seeing my professors lead with passion and enthusiasm sparked a similar desire in me to contribute to students’ academic journeys.”

Guillen recognizes that were it not for his student experiences at CSUF in the past decade, he would not be equipped to understand and impart economic knowledge. “Earning both my undergraduate and graduate degrees at CSUF gave me a solid foundation in both theory and applied analysis, which not only prepared me for professional success but also equipped me to return as an effective instructor,” he says. “That background—combined with my familiarity with the student experience at CSUF—allows me to tailor my teaching approach, whether that means adjusting lectures, offering flexible support, or fostering a classroom environment that’s both challenging and relatable.”

Why should you consider an M.A. in economics as Guillen did? The fact that the program sits on the intersection of economic theory, mathematics, data analysis and critical thinking, all in-demand skills in our AI-focused age, mean this is a worthwhile investment, preparing you for STEM-based careers as well as business acumen.

“Choosing to pursue your economics master’s degree at Cal State Fullerton adds another layer of value. The program offers rigorous training while providing access to a dedicated and world-class faculty and staff who truly care about student success. It’s an environment that prepares you not just academically, but professionally as well,” says Guillen.

To get started on your M.A. in economics journey, read more of our articles on the M.A. in economics. Or discover the full scope and offerings of our Business Graduate Programs.