Skip to content
BackNov 7
Marko C.
Upwork badge

Marko C.

HEC-RAS & HEC-HMS Specialist | QGIS Expert | Stormwater Management

I am a civil engineer specializing in hydraulic and hydrologic modeling for river regulation, floodplain mapping, stormwater systems, and watershed management. My work includes HEC-RAS 1D and 2D modeling, HEC-HMS hydrology, and QGIS stream and catchment delineation. I have extensive experience in designing and analyzing rivers, bridges, culverts, and dams, as well as developing floodplain and floodway maps in compliance with FEMA and local standards. I started building HEC-RAS models during my bachelor’s studies and expanded my expertise in QGIS and HEC-HMS during my master’s research and professional work. Over time, I have contributed to all phases of water management projects—from conceptual studies to detailed design. My experience in water resources management includes: • Hydraulic modeling of open-channel flow and flood hazard quantification. • Hydrologic and hydraulic analyses for flood control dams within detailed watershed studies. • Bridge and culvert hydraulic analyses to determine design flood elevations and required freeboard for lower chord placement. • Design support for large-scale highway drainage systems. • Full project involvement in run-of-the-river hydropower plants (>5 MW and several <1 MW), covering dam design, headwater, and design discharge calculations. Currently, I serve as a Senior Associate on river regulation and flood and drought protection projects. I am a dedicated professional committed to high-quality, transparent work and maintaining clear communication throughout every project. Areas of expertise include: • Developing advanced HEC-RAS 1D and 2D hydraulic models using the latest versions, with detailed result visualization and map-based presentation in RAS-Mapper. • Building and calibrating HEC-HMS hydrologic models to generate accurate runoff hydrographs for ungauged streams and to verify and align them with gauged catchments, ensuring reliable flow inputs for HEC-RAS simulations. • Performing QGIS-based stream and catchment delineation, watershed preprocessing, and terrain analysis to support hydrologic and hydraulic model setup. • Conducting floodplain and floodway modeling in accordance with FEMA and local regulatory standards. • Managing both urban stormwater and rural drainage systems by integrating open-channel and closed-conduit networks, and coupling HEC-RAS 2D surface flow modeling with EPA SWMM for comprehensive stormwater management. • Experienced in watershed hydrology, hydrologic and water resources modeling, and simulation. • Proficient in Aquaterra by CGS Labs for river and channel engineering design. • Experienced in using AutoCAD and Civil 3D on a daily basis to complement hydraulic and hydrologic modeling workflows.

🇧🇦Banja Luka, Bosnia and Herzegovina$50/hr100% JSS5.00 (8)Since Oct 2021

Earnings and projects

MRR
$83

Last 6 months ÷ 6

World#139,543 / 412k
🇧🇦Country#264 / 903
Revenue, last 30 days
$0

Last 6 months: $495

Total earnings
$30k

Billed in all: $30k

World#110,232 / 412k
🇧🇦Country#279 / 903
Per project
$3k

$495 in the last 6 months

World#55,476 / 412k
🇧🇦Country#125 / 903
Projects, last 6 months
1
100% fixed0% hourly
World#128,092 / 412k
🇧🇦Country#245 / 903
Projects in all
10

Across 12 contracts

58% fixed42% hourly
World#201,797 / 412k
🇧🇦Country#520 / 903

Earnings, last 30 days

$30.2kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$29.5k$30.0k$30.5k$31.0kOct 8Oct 23Nov 7

Skill rankings: Top 37% in QGIS

Ranked by MRR among everyone on Upwork with the skill.

  1. #14Storm Water Management Model25 freelancers · 🇧🇦 #1Top 56%
  2. #16HEC-HMS33 freelancers · 🇧🇦 #1Top 48%
  3. #18Hydraulic Simulation37 freelancers · 🇧🇦 #1Top 49%
  4. #21HEC-RAS46 freelancers · 🇧🇦 #1Top 46%
  5. #30Hydrology72 freelancers · 🇧🇦 #1Top 42%
  6. #41Hydraulic Engineering86 freelancers · 🇧🇦 #1Top 48%
  7. #225QGIS607 freelancers · 🇧🇦 #2Top 37%
  8. #270AutoCAD Civil 3D669 freelancers · 🇧🇦 #5Top 40%