Subsurface Investigations (Drilling, Sampling and Geophysical); Retaining Wall Designs; Slope Stability Analyses (Static and Seismic Loading); Footing and Mat Foundation Designs; Pier and Piling Designs and Analyses; Drainage/ Seepage/ Dewatering Evaluations; Soil Improvement/ Amendment Recommendations; Foundation Engineering; Expansive and/or Corrosive Soils (Identification and Mitigation)