Principals & Directors
PSC is led by practitioners — professionals who have managed construction, directed forensic analysis, and supported dispute resolution at the highest levels. Every engagement is led by a senior professional, not delegated to junior staff.
Gregory Lee is the founder and CEO of PSC and one of the most experienced testifying experts in construction delay and forensic scheduling in North America. Over an 18-year career he has directed schedule analysis and provided expert testimony across $10B+ in disputed claims — with an undefeated record across five years of active dispute engagements.
Greg has led forensic analysis and testified in arbitration, mediation, and litigation on programs spanning healthcare, aviation, heavy civil, government, data centers, and industrial construction across the United States, Australia, Europe, Asia, and the Middle East.
He is a U.S. Army veteran, an active member of AACE International, and holds a Master of Science in Construction Management from Texas A&M University.
Peter Tignini brings 30+ years of international project controls experience across $100B+ in capital programs and has personally supported resolution of $8B+ in construction disputes. He has directed forensic schedule analysis, governance frameworks, and claims strategy on programs spanning oil and gas, healthcare, data centers, aviation, and heavy civil infrastructure across North America, the Middle East, and Asia-Pacific.
He is the author of the When Controls Lie series and holds an MBA from London Business School.
At PSC, Peter leads all three divisions — Dispute Resolution & Forensic Services, CPM Scheduling, and Construction Management & Owner’s Representation.
Brandon Lee is PSC’s Director of Business Development and the firm’s primary client-facing contact for new engagements. He has led procurement and bid strategy on over 400 construction projects with a total negotiated value exceeding $4 billion.
At PSC, Brandon is the first point of contact for owners, contractors, and legal counsel — bringing the firm’s five-year, zero adverse findings record directly to every client conversation.
Veronica Lee is an Associate Principal at PSC and a founding member of the firm. Her project controls work spans baseline schedules, TIA, delay claims, and forensic analysis — including detailed analysis on U.S. Army Corps of Engineers programs from baseline through REA.
At PSC, Veronica oversees contracts, operations, and client account management, ensuring every engagement is supported by the administrative and contractual infrastructure that protects both the firm and its clients.
Miles Hersey, AIA, LEED AP, serves as a Director at Precision Scheduling Consultants (PSC), bringing extensive experience in the design, development, and construction of projects from schematic design through occupancy. His leadership focuses on delivering efficient, value-driven solutions while maintaining project schedules, budgets, and quality standards for clients across a variety of sectors.
Miles specializes in comprehensive consultant team management, coordinating architects, engineers, contractors, and stakeholders throughout all phases of project delivery. He works closely with clients to program projects, develop space requirements, create functional layouts, and ensure compliance with applicable building codes and regulations.
His responsibilities include establishing project budgets and schedules, managing design teams, reviewing technical documents, overseeing competitive bid processes, defining project scopes, and awarding contracts. Through proactive coordination and strategic planning, Miles consistently helps clients achieve successful project outcomes while maximizing value and operational efficiency.
As Finance Manager at Precision Scheduling Consultants (PSC), Ann Rubino provides strategic financial leadership to support the firm’s growth and operational health. From overseeing recurring reporting and complex financial modeling to managing vendor commitments and regulatory compliance, Ann ensures the firm’s financial foundation is both robust and scalable. Dedicated to safeguarding sensitive company data and optimizing treasury functions, she plays a vital role in enabling PSC to meet its strategic objectives across its diverse project portfolio.
Scheduling & Project Controls
PSC’s practitioner team delivers CPM scheduling, schedule analysis, and project controls services across all three divisions under direct oversight of firm leadership.
Cheron has led CPM scheduling and project controls programs for more than 25 years across federal, infrastructure, healthcare, pipeline rehabilitation, heavy civil, manufacturing, and IT environments — including DOD, DOE, vertical construction, and complex capital portfolios.
Cheron is an expert in Primavera P6 scheduling, enterprise implementation, integrated project controls, earned value management, cost and manpower loading, schedule risk analysis, and claims support. She has developed centralized scheduling Centers of Excellence, established enterprise scheduling governance, and advanced ERP and BI integrations to strengthen forecasting, reduce schedule slippage, and support defensible time-impact analyses.
Saad is a Civil Engineer with postgraduate training in Advanced Construction Project Management and more than 20 years of experience leading project controls, planning, scheduling, and forensic delay analysis across major construction and civil engineering programs in the United States, Australia, the Middle East, and Pakistan.
Saad has supported high-profile, fast-track, and complex projects delivered through traditional, EPC, design-build, framework, and partnering procurement models — including large-scale city developments, high-rise residential and commercial towers, hospitals, metro and rail stations, transportation corridors, shopping malls, luxury villas, residential townships, and heavy industrial facilities. He brings extensive experience in project management, program controls, budget and cash flow management, productivity and resource monitoring, schedule control, and forensic delay analysis for multibillion-dollar projects worldwide.
Juan Pablo brings 17 years of deep project controls and scheduling expertise to PSC, with a track record across complex EPC projects in semiconductors, infrastructure, and industrial construction. As an expert in Primavera P6 and MS Project, he leads critical path analysis, earned value management, and budget control on large-scale programs — the kind of precision work that keeps projects on schedule and aligned with financial realities.
His background spans project controls management on major programs, including Intel semiconductor facilities, pipelines, and federal infrastructure projects. Juan Pablo is fluent in Spanish and English and communicates directly with clients, engineers, and field teams to deliver detailed schedule visibility and trend analysis that prevents surprises.
At PSC, he brings the discipline of lean scheduling and forensic controls — the work that separates on-time delivery from expensive delays.
Sergio Menchaca has led CPM scheduling and project controls engagements at PSC since 2015 across commercial, government, healthcare, education, industrial, and multi-family construction — including over two years on the $300M GM Body Shop Project in Arlington, Texas.
He holds dual degrees from UTSA and carries PSP and PMP designations. At PSC, Sergio directs the CPM Scheduling Services division across active federal, commercial, and institutional programs.
At PSC since 2017, delivering CPM scheduling and project controls across programs from $5M to $150M+. Scope includes CPM scheduling, pull planning, earned value, schedule review, and forensic delay analysis. MS Construction Management, UT Arlington. Recognized by AACE International’s Rising Professionals Committee, 2021.
Donald Nwan is a Senior Project Scheduler and Program Controls Leader with over 10 years of experience supporting federal, data center, energy, and infrastructure programs valued at more than $590 million. He specializes in CPM scheduling, Integrated Master Schedules (IMS), cost and resource loading, schedule risk analysis, and Earned Value Management (EVM), leveraging tools such as Primavera P6 and Microsoft Project to drive project success.
An honorably retired U.S. Navy veteran, Donald is recognized for his leadership in schedule governance, risk mitigation, and project controls oversight. His ability to align stakeholders, improve schedule performance, and deliver actionable project insights has contributed to the successful execution of complex, mission-critical programs.
At PSC since 2018, delivering CPM scheduling across commercial, government, and institutional programs. Work spans baseline development, progress tracking, and schedule analysis using Primavera P6 and Microsoft Project.
Blake Martinez is a scheduling consultant at PSC delivering CPM scheduling across commercial and institutional construction programs under direct division leadership oversight.
Param Kodangal has been a valued member of PSC for the past 3 years, contributing to CPM scheduling efforts across commercial, government, and institutional projects. His experience includes baseline schedule development, progress updates, and schedule analysis utilizing Primavera P6 and Microsoft Project.
Nathan Kilonsky has been with PSC for the past year, supporting CPM scheduling efforts across commercial, government, and institutional projects. His work includes schedule development, progress tracking, and schedule analysis using Primavera P6 and Microsoft Project.
Madhavi Isukapalli has been a Senior Planner with Precision Scheduling Consultants (PSC) for the past 2 years, supporting project teams across commercial, government, and institutional sectors. Her experience includes CPM schedule development, progress monitoring, schedule analysis, and project coordination utilizing Primavera P6 and Microsoft Project.
Joslynn Esquivel serves as an Administrative Assistant at Precision Scheduling Consultants (PSC), where she supports daily operations and helps ensure efficient coordination across the team. With a strong attention to detail and excellent organizational skills, Joslynn assists with administrative processes, communication management, scheduling coordination, and client support activities. Known for her professionalism and dependable approach, Joslynn plays an important role in maintaining smooth office operations and supporting PSC’s commitment to delivering high-quality service to clients across commercial, government, and institutional projects.
Charlee manages the operational foundation of PSC’s office, handling client accounts, project coordination, and expert scheduling. Her attention to detail, responsiveness, and organizational skills ensure that complex engagements run smoothly from intake to delivery. As a primary point of contact for clients, she combines technical competence with a customer-first approach, ensuring nothing falls through the cracks and every detail reflects PSC’s commitment to excellence.
Omar Penilla is a Senior Project Scheduler specializing in CPM scheduling, planning, and project controls for large-scale infrastructure and data center programs. With expertise in critical path management and schedule risk analysis, Omar brings precision and clarity to complex project timelines. His experience supporting multi-million dollar programs in fast-paced environments demonstrates his ability to deliver actionable scheduling solutions that keep projects on tsrack. Omar’s meticulous approach to schedule integration and baseline development ensures alignment across all stakeholders. At PSC, he leverages his scheduling expertise to drive program success and operational efficiency.
Karel Bietje is a Senior Project Manager with over 20 years of experience delivering complex construction and infrastructure projects across multiple continents. A recognized specialist in modern methods of construction (MMC), Lean methodologies, and Takt Planning, Karel brings innovation and discipline to project delivery. Currently serving as a Construction System Architect, Karel integrates AI-enabled workflow automation with proven Lean construction principles to optimize project execution. His global perspective and commitment to operational excellence make him an invaluable addition to projects.
Credentialed Depth Across Three Divisions
Beyond named practitioners, PSC maintains a bench of CPM scheduling professionals across six global offices — San Antonio, Dallas, Orlando, San Diego, London, and Dubai — supporting engagements of every scale and complexity.
Discuss Your Engagement
Schedule a consultation with the PSC team — direct access to senior practitioners from first call.